diff --git a/.github/workflows/update-colors.yml b/.github/workflows/update-colors.yml
new file mode 100644
index 00000000..cb47edf8
--- /dev/null
+++ b/.github/workflows/update-colors.yml
@@ -0,0 +1,58 @@
+name: Get/Update Primer Color Primitives
+
+env:
+  _DEST_DIR: '${{ github.workspace }}/lua/github-theme/palette/primitives'
+  _JSON_DIR: '${{ github.workspace }}/node_modules/@primer/primitives/dist/json/colors'
+  _LICENSE_GLOB: '${{ github.workspace }}/node_modules/@primer/primitives/[Ll][Ii][Cc][Ee][Nn][Ss][Ee]*'
+  _PRIMITIVES_PKGJSON: '${{ github.workspace }}/node_modules/@primer/primitives/package.json'
+
+on:
+  workflow_dispatch:
+  schedule:
+    # 3x per week (every other day) at 12:40pm Pacific Time
+    - cron: '40 19 * * 1,3,5'
+
+jobs:
+  get-colors:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-node@v3
+        with:
+          node-version: lts
+          check-latest: true
+
+      - run: npm i @primer/primitives@latest
+
+      - run: |
+          set -u +f
+          shopt -s nocaseglob failglob
+          license="$(<$_LICENSE_GLOB)"
+          rm -r "$_DEST_DIR" || :
+          mkdir -p "$_DEST_DIR"
+          cd "$_JSON_DIR"
+
+          if jq -e .version "$_PRIMITIVES_PKGJSON"; then
+            version="M._VERSION = vim.json.decode([=[$(jq -e .version "$_PRIMITIVES_PKGJSON")]=], { luanil = { object = false, array = false } })"
+          fi
+
+          for file in *.json; do
+            cat >|"${_DEST_DIR}/${file%.json}.lua" <<EOF
+          -- NOTE: THIS IS AN AUTO-GENERATED FILE. DO NOT EDIT BY-HAND.
+          local M = vim.json.decode([=[$(<"$file")]=], { luanil = { object = false, array = false } })
+          ${version-}
+          M._LICENSE = [=[
+          $license]=]
+          return M
+          EOF
+          done
+
+      - run: make fmt
+
+      - uses: peter-evans/create-pull-request@v5
+        with:
+          commit-message: Update color primitives
+          branch: update-color-primitives
+          delete-branch: true
+          title: Update color primitives
diff --git a/.gitignore b/.gitignore
index 73208f24..624c30df 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ doc/tags
 test/plenary
 .repro
 misc
+node_modules/
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 00000000..bad4d37e
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,18 @@
+{
+  "name": "github-nvim-theme",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "github-nvim-theme",
+      "dependencies": {
+        "@primer/primitives": "^7.11.10"
+      }
+    },
+    "node_modules/@primer/primitives": {
+      "version": "7.11.10",
+      "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-7.11.10.tgz",
+      "integrity": "sha512-KwChxyp4qbLojZx5Nz8RUElM9K+ObzZWvzkYEu76TC4qEsqb9wW7n78jyov5WhUh5+qj2Qac1iCsPfeTQG5YBw=="
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 00000000..43107c19
--- /dev/null
+++ b/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "github-nvim-theme",
+  "private": true,
+  "dependencies": {
+    "@primer/primitives": "^7.11.10"
+  }
+}