diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 58b55fc7c..fede20946 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -40,3 +40,17 @@ jobs:
 
       - name: Test docs
         run: npm run docs
+
+      - name: Run accessibility tests
+        run: npm run docs-accessibility
+
+      - name: Generate HTML accessibility results
+        run: npm run docs-pa11y-html
+        if: failure()
+
+      - name: Upload accessibility results
+        uses: actions/upload-artifact@v2
+        if: failure()
+        with:
+          name: pa11y-ci-results
+          path: .pa11y/
diff --git a/.gitignore b/.gitignore
index 6208c57d7..3566a9d4a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,3 +50,5 @@ Thumbs.db
 # Folders to ignore
 /js/coverage/
 /node_modules/
+/.pa11y/
+/pa11y-ci-results.json
diff --git a/build/.pa11yci.json b/build/.pa11yci.json
new file mode 100644
index 000000000..ed1b512cc
--- /dev/null
+++ b/build/.pa11yci.json
@@ -0,0 +1,11 @@
+{
+  "standard": "WCAG2AA",
+  "level": "error",
+  "concurrency": 4,
+  "runners": [
+    "htmlcs"
+  ],
+  "defaults": {
+    "hideElements": ".bd-search, [class*=-success], [class*=-info], [class*=-light]"
+  }
+}
diff --git a/package-lock.json b/package-lock.json
index 8a88da988..f394a175d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1139,6 +1139,12 @@
         "fastq": "^1.6.0"
       }
     },
+    "@polka/url": {
+      "version": "1.0.0-next.11",
+      "resolved": "https://registry.npmjs.org/@polka/url/-/url-1.0.0-next.11.tgz",
+      "integrity": "sha512-3NsZsJIA/22P3QUyrEDNA2D133H4j224twJrdipXN38dpnIOzAbUDtOwkcJ5pXmn75w7LSQDjA4tO9dm1XlqlA==",
+      "dev": true
+    },
     "@popperjs/core": {
       "version": "2.5.4",
       "resolved": "https://registry.npmjs.org/@popperjs/core/-/core-2.5.4.tgz",
@@ -1483,6 +1489,12 @@
       "dev": true,
       "optional": true
     },
+    "array-find-index": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/array-find-index/-/array-find-index-1.0.2.tgz",
+      "integrity": "sha1-3wEKoSh+Fku9pvlyOwqWoexBh6E=",
+      "dev": true
+    },
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       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/array-includes/-/array-includes-3.1.2.tgz",
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       "dev": true
     },
+    "array-uniq": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/array-uniq/-/array-uniq-1.0.3.tgz",
+      "integrity": "sha1-r2rId6Jcx/dOBYiUdThY39sk/bY=",
+      "dev": true
+    },
     "array-unique": {
       "version": "0.3.2",
       "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.3.2.tgz",
@@ -1545,6 +1563,15 @@
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       "dev": true
     },
+    "async": {
+      "version": "2.6.3",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.3.tgz",
+      "integrity": "sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==",
+      "dev": true,
+      "requires": {
+        "lodash": "^4.17.14"
+      }
+    },
     "async-each": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.3.tgz",
@@ -1585,6 +1612,12 @@
         "postcss-value-parser": "^4.1.0"
       }
     },
+    "axe-core": {
+      "version": "3.5.5",
+      "resolved": "https://registry.npmjs.org/axe-core/-/axe-core-3.5.5.tgz",
+      "integrity": "sha512-5P0QZ6J5xGikH780pghEdbEKijCTrruK9KxtPZCFWUpef0f6GipO+xEZ5GKCb020mmqgbiNO6TcA55CriL784Q==",
+      "dev": true
+    },
     "axios": {
       "version": "0.19.2",
       "resolved": "https://registry.npmjs.org/axios/-/axios-0.19.2.tgz",
@@ -1904,6 +1937,17 @@
         "callsite": "1.0.0"
       }
     },
+    "bfj": {
+      "version": "4.2.4",
+      "resolved": "https://registry.npmjs.org/bfj/-/bfj-4.2.4.tgz",
+      "integrity": "sha1-hfeyNoPCr9wVhgOEotHD+sgO0zo=",
+      "dev": true,
+      "requires": {
+        "check-types": "^7.3.0",
+        "hoopy": "^0.1.2",
+        "tryer": "^1.0.0"
+      }
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       "resolved": "https://registry.npmjs.org/bin-check/-/bin-check-4.1.0.tgz",
@@ -2521,6 +2565,18 @@
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       "dev": true
     },
+    "chardet": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/chardet/-/chardet-1.3.0.tgz",
+      "integrity": "sha512-cyTQGGptIjIT+CMGT5J/0l9c6Fb+565GCFjjeUTKxUO7w3oR+FcNCMEKTn5xtVKaLFmladN7QF68IiQsv5Fbdw==",
+      "dev": true
+    },
+    "check-types": {
+      "version": "7.4.0",
+      "resolved": "https://registry.npmjs.org/check-types/-/check-types-7.4.0.tgz",
+      "integrity": "sha512-YbulWHdfP99UfZ73NcUDlNJhEIDgm9Doq9GhpyXbF+7Aegi3CVV7qqMCKTTqJxlvEvnQBp9IA+dxsGN6xK/nSg==",
+      "dev": true
+    },
     "cheerio": {
       "version": "1.0.0-rc.3",
       "resolved": "https://registry.npmjs.org/cheerio/-/cheerio-1.0.0-rc.3.tgz",
@@ -2641,6 +2697,23 @@
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       "dev": true
     },
+    "ci-logger": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/ci-logger/-/ci-logger-3.0.2.tgz",
+      "integrity": "sha512-sX3FPFXou/6oOT4Cx0wSmuEV33nlOOYP5pL2mdyqhTlYfz/wnniX4W4iSdNQuKcCgyV3Q0tqyV4CFiGFG34BKg==",
+      "dev": true,
+      "requires": {
+        "@sindresorhus/is": "^4.0.0"
+      },
+      "dependencies": {
+        "@sindresorhus/is": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-4.0.0.tgz",
+          "integrity": "sha512-FyD2meJpDPjyNQejSjvnhpgI/azsQkA4lGbuu5BQZfjvJ9cbRZXzeWL2HceCekW4lixO9JPesIIQkSoLjeJHNQ==",
+          "dev": true
+        }
+      }
+    },
     "class-utils": {
       "version": "0.3.6",
       "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
@@ -2866,6 +2939,18 @@
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       "dev": true
     },
+    "concat-stream": {
+      "version": "1.6.2",
+      "resolved": "https://registry.npmjs.org/concat-stream/-/concat-stream-1.6.2.tgz",
+      "integrity": "sha512-27HBghJxjiZtIk3Ycvn/4kbJk/1uZuJFfuPEns6LaEvpvG1f0hTea8lilrouyo9mVc2GWdcEZ8OLoGmSADlrCw==",
+      "dev": true,
+      "requires": {
+        "buffer-from": "^1.0.0",
+        "inherits": "^2.0.3",
+        "readable-stream": "^2.2.2",
+        "typedarray": "^0.0.6"
+      }
+    },
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       "resolved": "https://registry.npmjs.org/config-chain/-/config-chain-1.1.12.tgz",
@@ -2925,6 +3010,12 @@
         "utils-merge": "1.0.1"
       }
     },
+    "console-clear": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/console-clear/-/console-clear-1.1.1.tgz",
+      "integrity": "sha512-pMD+MVR538ipqkG5JXeOEbKWS5um1H4LUUccUQG68qpeqBYbzYy79Gh55jkd2TtPdRfUaLWdv6LPP//5Zt0aPQ==",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/contains-path/-/contains-path-0.1.0.tgz",
@@ -3069,6 +3160,15 @@
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       "dev": true
     },
+    "currently-unhandled": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/currently-unhandled/-/currently-unhandled-0.4.1.tgz",
+      "integrity": "sha1-mI3zP+qxke95mmE2nddsF635V+o=",
+      "dev": true,
+      "requires": {
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+      }
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       "resolved": "https://registry.npmjs.org/custom-event/-/custom-event-1.0.1.tgz",
@@ -3358,6 +3458,208 @@
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       }
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+    "delay-cli": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/delay-cli/-/delay-cli-1.1.0.tgz",
+      "integrity": "sha512-s+DSq4ngTvKXgl2pO3HutcnXgmSZ2/CgnWzVMrQDfK0hX+jjm31zVs8WrzstXKbOFjllt+5rIuBTCNFlZCk+Fw==",
+      "dev": true,
+      "requires": {
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+      },
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+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
+          "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0=",
+          "dev": true
+        },
+        "camelcase-keys": {
+          "version": "4.2.0",
+          "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-4.2.0.tgz",
+          "integrity": "sha1-oqpfsa9oh1glnDLBQUJteJI7m3c=",
+          "dev": true,
+          "requires": {
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+            "map-obj": "^2.0.0",
+            "quick-lru": "^1.0.0"
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+          "resolved": "https://registry.npmjs.org/find-up/-/find-up-2.1.0.tgz",
+          "integrity": "sha1-RdG35QbHF93UgndaK3eSCjwMV6c=",
+          "dev": true,
+          "requires": {
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+        "indent-string": {
+          "version": "3.2.0",
+          "resolved": "https://registry.npmjs.org/indent-string/-/indent-string-3.2.0.tgz",
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@@ -4485,6 +4787,29 @@
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+      "requires": {
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+        "debug": "^2.6.9",
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+          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
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+          "dev": true,
+          "requires": {
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+    "file-url": {
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+      "resolved": "https://registry.npmjs.org/file-url/-/file-url-3.0.0.tgz",
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+    },
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+      "integrity": "sha512-bt48RDBy2eIwZPrkgbcwHtb51mj2nKvHOPMaSH2IsWiv7lOG9k9zhaRzpDZafrk05ajMc3cu+lSQYYOfH2DkVQ==",
+      "dev": true,
+      "requires": {
+        "debug": "^4.1.0",
+        "extract-zip": "^1.6.6",
+        "https-proxy-agent": "^2.2.1",
+        "mime": "^2.0.3",
+        "progress": "^2.0.1",
+        "proxy-from-env": "^1.0.0",
+        "rimraf": "^2.6.1",
+        "ws": "^6.1.0"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.3.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.1.tgz",
+          "integrity": "sha512-doEwdvm4PCeK4K3RQN2ZC2BYUBaxwLARCqZmMjtF8a51J2Rb0xpVloFRnCODwqjpwnAoao4pelN8l3RJdv3gRQ==",
+          "dev": true,
+          "requires": {
+            "ms": "2.1.2"
+          }
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
+          "dev": true
+        },
+        "rimraf": {
+          "version": "2.7.1",
+          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.7.1.tgz",
+          "integrity": "sha512-uWjbaKIK3T1OSVptzX7Nl6PvQ3qAGtKEtVRjRuazjfL3Bx5eI409VZSqgND+4UNnmzLVdPj9FqFJNPqBZFve4w==",
+          "dev": true,
+          "requires": {
+            "glob": "^7.1.3"
+          }
+        },
+        "ws": {
+          "version": "6.2.1",
+          "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.1.tgz",
+          "integrity": "sha512-GIyAXC2cB7LjvpgMt9EKS2ldqr0MTrORaleiOno6TweZ6r3TKtoFQWay/2PceJ3RuBasOHzXNn5Lrw1X0bEjqA==",
+          "dev": true,
+          "requires": {
+            "async-limiter": "~1.0.0"
+          }
+        }
+      }
+    },
     "q": {
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/q/-/q-1.5.1.tgz",
@@ -9353,6 +10059,15 @@
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       "dev": true
     },
+    "sade": {
+      "version": "1.7.4",
+      "resolved": "https://registry.npmjs.org/sade/-/sade-1.7.4.tgz",
+      "integrity": "sha512-y5yauMD93rX840MwUJr7C1ysLFBgMspsdTo4UVrDg3fXDvtwOyIqykhVAAm6fk/3au77773itJStObgK+LKaiA==",
+      "dev": true,
+      "requires": {
+        "mri": "^1.1.0"
+      }
+    },
     "safe-buffer": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
@@ -9401,6 +10116,12 @@
         }
       }
     },
+    "semiver": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/semiver/-/semiver-1.1.0.tgz",
+      "integrity": "sha512-QNI2ChmuioGC1/xjyYwyZYADILWyW6AmS1UH6gDj/SFUUUS4MBAWs/7mxnkRPc/F4iHezDP+O8t0dO8WHiEOdg==",
+      "dev": true
+    },
     "semver": {
       "version": "5.7.1",
       "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
@@ -9667,6 +10388,33 @@
         }
       }
     },
+    "sirv": {
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/sirv/-/sirv-1.0.10.tgz",
+      "integrity": "sha512-H5EZCoZaggEUQy8ocKsF7WAToGuZhjJlLvM3XOef46CbdIgbNeQ1p32N1PCuCjkVYwrAVOSMacN6CXXgIzuspg==",
+      "dev": true,
+      "requires": {
+        "@polka/url": "^1.0.0-next.9",
+        "mime": "^2.3.1",
+        "totalist": "^1.0.0"
+      }
+    },
+    "sirv-cli": {
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/sirv-cli/-/sirv-cli-1.0.10.tgz",
+      "integrity": "sha512-8mLTRkvzpZXMyUZJ1whf84YHN/mm2r2+j5sU1ZYr5n2jA8VkFItNPk53oysOo+0QxBVp9aUjggkAsQp1d7L3OQ==",
+      "dev": true,
+      "requires": {
+        "console-clear": "^1.1.0",
+        "get-port": "^3.2.0",
+        "kleur": "^3.0.0",
+        "local-access": "^1.0.1",
+        "sade": "^1.6.0",
+        "semiver": "^1.0.0",
+        "sirv": "^1.0.10",
+        "tinydate": "^1.0.0"
+      }
+    },
     "slash": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/slash/-/slash-2.0.0.tgz",
@@ -10890,6 +11638,12 @@
       "integrity": "sha1-8y6srFoXW+ol1/q1Zas+2HQe9W8=",
       "dev": true
     },
+    "tinydate": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/tinydate/-/tinydate-1.3.0.tgz",
+      "integrity": "sha512-7cR8rLy2QhYHpsBDBVYnnWXm8uRTr38RoZakFSW7Bs7PzfMPNZthuMLkwqZv7MTu8lhQ91cOFYS5a7iFj2oR3w==",
+      "dev": true
+    },
     "tmp": {
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.2.1.tgz",
@@ -10975,6 +11729,12 @@
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       "dev": true
     },
+    "totalist": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/totalist/-/totalist-1.1.0.tgz",
+      "integrity": "sha512-gduQwd1rOdDMGxFG1gEvhV88Oirdo2p+KjoYFU7k2g+i7n6AFFbDQ5kMPUsW0pNbfQsB/cwXvT1i4Bue0s9g5g==",
+      "dev": true
+    },
     "touch": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/touch/-/touch-3.1.0.tgz",
@@ -11011,6 +11771,12 @@
       "integrity": "sha512-rvuRbTarPXmMb79SmzEp8aqXNKcK+y0XaB298IXueQ8I2PsrATcPBCSPyK/dDNa2iWOhKlfNnOjdAOTBU/nkFA==",
       "dev": true
     },
+    "tryer": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/tryer/-/tryer-1.0.1.tgz",
+      "integrity": "sha512-c3zayb8/kWWpycWYg87P71E1S1ZL6b6IJxfb5fvsUgsf0S2MVGaDhDXXjDMpdCpfWXqptc+4mXwmiy1ypXqRAA==",
+      "dev": true
+    },
     "tsconfig-paths": {
       "version": "3.9.0",
       "resolved": "https://registry.npmjs.org/tsconfig-paths/-/tsconfig-paths-3.9.0.tgz",
@@ -11068,6 +11834,12 @@
         "mime-types": "~2.1.24"
       }
     },
+    "typedarray": {
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
+      "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=",
+      "dev": true
+    },
     "typedarray-to-buffer": {
       "version": "3.1.5",
       "resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz",
@@ -11083,6 +11855,13 @@
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       "dev": true
     },
+    "uglify-js": {
+      "version": "3.12.1",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.12.1.tgz",
+      "integrity": "sha512-o8lHP20KjIiQe5b/67Rh68xEGRrc2SRsCuuoYclXXoC74AfSRGblU1HKzJWH3HxPZ+Ort85fWHpSX7KwBUC9CQ==",
+      "dev": true,
+      "optional": true
+    },
     "unbzip2-stream": {
       "version": "1.4.3",
       "resolved": "https://registry.npmjs.org/unbzip2-stream/-/unbzip2-stream-1.4.3.tgz",
@@ -11533,6 +12312,12 @@
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       "dev": true
     },
+    "wordwrap": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
+      "integrity": "sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus=",
+      "dev": true
+    },
     "wrap-ansi": {
       "version": "6.2.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
diff --git a/package.json b/package.json
index e1e601760..108160590 100644
--- a/package.json
+++ b/package.json
@@ -58,8 +58,11 @@
     "docs-linkinator": "linkinator _gh_pages --recurse --silent --skip \"^(?!http://localhost)\"",
     "docs-vnu": "node build/vnu-jar.js",
     "docs-lint": "npm-run-all --parallel docs-vnu docs-linkinator",
+    "docs-pa11y": "delay 3 && pa11y-ci --config build/.pa11yci.json --sitemap http://localhost:9001/sitemap.xml --sitemap-find https://getbootstrap.com --sitemap-replace http://localhost:9001 --json > pa11y-ci-results.json",
+    "docs-pa11y-html": "pa11y-ci-reporter-html -d .pa11y",
+    "docs-accessibility": "npm-run-all --parallel --race docs-serve-only docs-pa11y",
     "docs-serve": "hugo server --port 9001 --disableFastRender",
-    "docs-serve-only": "npx sirv-cli _gh_pages --port 9001",
+    "docs-serve-only": "sirv _gh_pages --port 9001",
     "lockfile-lint": "lockfile-lint --allowed-hosts npm --allowed-schemes https: --empty-hostname false --type npm --path package-lock.json",
     "update-deps": "ncu -u -x terser && npm update && echo Manually update site/assets/js/vendor",
     "release": "npm-run-all dist release-sri docs-build release-zip*",
@@ -110,6 +113,7 @@
     "bundlewatch": "^0.3.1",
     "clean-css-cli": "^4.3.0",
     "cross-env": "^7.0.3",
+    "delay-cli": "^1.1.0",
     "eslint": "^7.15.0",
     "eslint-config-xo": "^0.33.1",
     "eslint-plugin-import": "^2.22.1",
@@ -133,6 +137,8 @@
     "lockfile-lint": "^4.3.7",
     "nodemon": "^2.0.6",
     "npm-run-all": "^4.1.5",
+    "pa11y-ci": "^2.4.0",
+    "pa11y-ci-reporter-html": "^2.1.1",
     "postcss": "^8.2.1",
     "postcss-cli": "^8.3.1",
     "rollup": "^2.35.1",
@@ -140,6 +146,7 @@
     "rtlcss": "^3.0.0",
     "sass": "^1.30.0",
     "shelljs": "^0.8.4",
+    "sirv-cli": "^1.0.10",
     "stylelint": "^13.8.0",
     "stylelint-config-twbs-bootstrap": "^2.1.0",
     "terser": "5.1.0",