diff --git a/package.json b/package.json
index 199a296..7e42dc2 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,8 @@
     "version": "5.0.0",
     "description": "A stylesheet that supports fast dynamic recoloring via CSS variables",
     "scripts": {
-        "dev": "web-dev-server --watch"
+        "dev": "web-dev-server --watch",
+        "build": "cd dist && ./_build.sh && cd .."
     },
     "keywords": [
         "bluelib",
@@ -50,6 +51,7 @@
     "license": "AGPL-3.0-or-later",
     "private": false,
     "devDependencies": {
-        "@web/dev-server": "^0.1.34"
+        "@web/dev-server": "^0.1.34",
+        "less": "^4.1.3"
     }
 }
diff --git a/yarn.lock b/yarn.lock
index 6153add..c8c9d52 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -420,12 +420,19 @@ cookies@~0.8.0:
     depd "~2.0.0"
     keygrip "~1.1.0"
 
+copy-anything@^2.0.1:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/copy-anything/-/copy-anything-2.0.6.tgz#092454ea9584a7b7ad5573062b2a87f5900fc480"
+  integrity sha512-1j20GZTsvKNkc4BY3NpMOM8tt///wY3FpIzozTOFO2ffuZcV61nojHXVKIy3WM+7ADCy5FVhdZYHYDdgTU0yJw==
+  dependencies:
+    is-what "^3.14.1"
+
 debounce@^1.2.0:
   version "1.2.1"
   resolved "https://registry.npmjs.org/debounce/-/debounce-1.2.1.tgz#38881d8f4166a5c5848020c11827b834bcb3e0a5"
   integrity sha512-XRRe6Glud4rd/ZGQfiV1ruXSfbvfJedlV9Y6zOlP+2K04vBYiJEte6stfFkCP03aMnY5tsipamumUjL14fofug==
 
-debug@^3.1.0, debug@^3.2.7:
+debug@^3.1.0, debug@^3.2.6, debug@^3.2.7:
   version "3.2.7"
   resolved "https://registry.npmjs.org/debug/-/debug-3.2.7.tgz#72580b7e9145fb39b6676f9c5e5fb100b934179a"
   integrity sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==
@@ -489,6 +496,13 @@ encodeurl@^1.0.2:
   resolved "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz#ad3ff4c86ec2d029322f5a02c3a9a606c95b3f59"
   integrity sha512-TPJXq8JqFaVYm2CWmPvnP2Iyo4ZSM7/QKcSmuMLDObfpH5fi7RUGmd/rTDf+rut/saiDiQEeVTNgAmJEdAOx0w==
 
+errno@^0.1.1:
+  version "0.1.8"
+  resolved "https://registry.yarnpkg.com/errno/-/errno-0.1.8.tgz#8bb3e9c7d463be4976ff888f76b4809ebc2e811f"
+  integrity sha512-dJ6oBr5SQ1VSd9qkk7ByRgb/1SH4JZjCHSW/mr63/QcXO9zLVxvJ6Oy13nio03rxpSnVDDjFor75SjVeZWPW/A==
+  dependencies:
+    prr "~1.0.1"
+
 es-module-lexer@^1.0.0:
   version "1.0.3"
   resolved "https://registry.npmjs.org/es-module-lexer/-/es-module-lexer-1.0.3.tgz#f0d8d35b36d13024110000d5e6fadc8eeaeb66b8"
@@ -555,6 +569,11 @@ glob-parent@~5.1.2:
   dependencies:
     is-glob "^4.0.1"
 
+graceful-fs@^4.1.2:
+  version "4.2.10"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.10.tgz#147d3a006da4ca3ce14728c7aefc287c367d7a6c"
+  integrity sha512-9ByhssR2fPVsNZj478qUUbKfmL0+t5BDVyjShtyZZLiK7ZDAArFFfopyOTj0M05wE2tJPisA4iTnnXl2YoPvOA==
+
 has-flag@^3.0.0:
   version "3.0.0"
   resolved "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
@@ -608,6 +627,18 @@ http-errors@~1.6.2:
     setprototypeof "1.1.0"
     statuses ">= 1.4.0 < 2"
 
+iconv-lite@^0.6.3:
+  version "0.6.3"
+  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.6.3.tgz#a52f80bf38da1952eb5c681790719871a1a72501"
+  integrity sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==
+  dependencies:
+    safer-buffer ">= 2.1.2 < 3.0.0"
+
+image-size@~0.5.0:
+  version "0.5.5"
+  resolved "https://registry.yarnpkg.com/image-size/-/image-size-0.5.5.tgz#09dfd4ab9d20e29eb1c3e80b8990378df9e3cb9c"
+  integrity sha512-6TDAlDPZxUFCv+fuOkIoXT/V/f3Qbq8e37p+YOiYrUv3v9cc3/6x78VdfPgFVaB9dZYeLUfKgHRebpkm/oP2VQ==
+
 inherits@2.0.3:
   version "2.0.3"
   resolved "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
@@ -683,6 +714,11 @@ is-stream@^2.0.0:
   resolved "https://registry.npmjs.org/is-stream/-/is-stream-2.0.1.tgz#fac1e3d53b97ad5a9d0ae9cef2389f5810a5c077"
   integrity sha512-hFoiJiTl63nn+kstHGBtewWSKnQLpyb155KHheA1l39uvtO9nWIop1p3udqPcUd/xbF1VLMO4n7OI6p7RbngDg==
 
+is-what@^3.14.1:
+  version "3.14.1"
+  resolved "https://registry.yarnpkg.com/is-what/-/is-what-3.14.1.tgz#e1222f46ddda85dead0fd1c9df131760e77755c1"
+  integrity sha512-sNxgpk9793nzSs7bA6JQJGeIuRBQhAaNGG77kzYQgMkrID+lS6SlK07K5LaptscDlSaIgH+GPFzf+d75FVxozA==
+
 is-wsl@^2.2.0:
   version "2.2.0"
   resolved "https://registry.npmjs.org/is-wsl/-/is-wsl-2.2.0.tgz#74a4c76e77ca9fd3f932f290c17ea326cd157271"
@@ -773,6 +809,23 @@ koa@^2.13.0:
     type-is "^1.6.16"
     vary "^1.1.2"
 
+less@^4.1.3:
+  version "4.1.3"
+  resolved "https://registry.yarnpkg.com/less/-/less-4.1.3.tgz#175be9ddcbf9b250173e0a00b4d6920a5b770246"
+  integrity sha512-w16Xk/Ta9Hhyei0Gpz9m7VS8F28nieJaL/VyShID7cYvP6IL5oHeL6p4TXSDJqZE/lNv0oJ2pGVjJsRkfwm5FA==
+  dependencies:
+    copy-anything "^2.0.1"
+    parse-node-version "^1.0.1"
+    tslib "^2.3.0"
+  optionalDependencies:
+    errno "^0.1.1"
+    graceful-fs "^4.1.2"
+    image-size "~0.5.0"
+    make-dir "^2.1.0"
+    mime "^1.4.1"
+    needle "^3.1.0"
+    source-map "~0.6.0"
+
 lodash.camelcase@^4.3.0:
   version "4.3.0"
   resolved "https://registry.npmjs.org/lodash.camelcase/-/lodash.camelcase-4.3.0.tgz#b28aa6288a2b9fc651035c7711f65ab6190331a6"
@@ -790,6 +843,14 @@ lru-cache@^6.0.0:
   dependencies:
     yallist "^4.0.0"
 
+make-dir@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/make-dir/-/make-dir-2.1.0.tgz#5f0310e18b8be898cc07009295a30ae41e91e6f5"
+  integrity sha512-LS9X+dc8KLxXCb8dni79fLIIUA5VyZoyjSMCwTluaXA0o27cCK0bhXkpgw+sTXVpPy/lSO57ilRixqk0vDmtRA==
+  dependencies:
+    pify "^4.0.1"
+    semver "^5.6.0"
+
 media-typer@0.3.0:
   version "0.3.0"
   resolved "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz#8710d7af0aa626f8fffa1ce00168545263255748"
@@ -807,6 +868,11 @@ mime-types@^2.1.18, mime-types@^2.1.27, mime-types@~2.1.24, mime-types@~2.1.34:
   dependencies:
     mime-db "1.52.0"
 
+mime@^1.4.1:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
+  integrity sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==
+
 minimist@^1.2.6:
   version "1.2.6"
   resolved "https://registry.npmjs.org/minimist/-/minimist-1.2.6.tgz#8637a5b759ea0d6e98702cfb3a9283323c93af44"
@@ -834,6 +900,15 @@ nanocolors@^0.2.1:
   resolved "https://registry.npmjs.org/nanocolors/-/nanocolors-0.2.13.tgz#dfd1ed0bfab05e9fe540eb6874525f0a1684099b"
   integrity sha512-0n3mSAQLPpGLV9ORXT5+C/D4mwew7Ebws69Hx4E2sgz2ZA5+32Q80B9tL8PbL7XHnRDiAxH/pnrUJ9a4fkTNTA==
 
+needle@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/needle/-/needle-3.1.0.tgz#3bf5cd090c28eb15644181ab6699e027bd6c53c9"
+  integrity sha512-gCE9weDhjVGCRqS8dwDR/D3GTAeyXLXuqp7I8EzH6DllZGXSUyxuqqLh+YX9rMAWaaTFyVAg6rHGL25dqvczKw==
+  dependencies:
+    debug "^3.2.6"
+    iconv-lite "^0.6.3"
+    sax "^1.2.4"
+
 negotiator@0.6.3:
   version "0.6.3"
   resolved "https://registry.npmjs.org/negotiator/-/negotiator-0.6.3.tgz#58e323a72fedc0d6f9cd4d31fe49f51479590ccd"
@@ -865,6 +940,11 @@ open@^8.0.2:
     is-docker "^2.1.1"
     is-wsl "^2.2.0"
 
+parse-node-version@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/parse-node-version/-/parse-node-version-1.0.1.tgz#e2b5dbede00e7fa9bc363607f53327e8b073189b"
+  integrity sha512-3YHlOa/JgH6Mnpr05jP9eDG254US9ek25LyIxZlDItp2iJtwyaXQb57lBYLdT3MowkUFYEV2XXNAYIPlESvJlA==
+
 parse5@^6.0.1:
   version "6.0.1"
   resolved "https://registry.npmjs.org/parse5/-/parse5-6.0.1.tgz#e1a1c085c569b3dc08321184f19a39cc27f7c30b"
@@ -890,6 +970,11 @@ picomatch@^2.0.4, picomatch@^2.2.1, picomatch@^2.2.2:
   resolved "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz#3ba3833733646d9d3e4995946c1365a67fb07a42"
   integrity sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==
 
+pify@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/pify/-/pify-4.0.1.tgz#4b2cd25c50d598735c50292224fd8c6df41e3231"
+  integrity sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==
+
 portfinder@^1.0.28:
   version "1.0.32"
   resolved "https://registry.npmjs.org/portfinder/-/portfinder-1.0.32.tgz#2fe1b9e58389712429dc2bea5beb2146146c7f81"
@@ -899,6 +984,11 @@ portfinder@^1.0.28:
     debug "^3.2.7"
     mkdirp "^0.5.6"
 
+prr@~1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/prr/-/prr-1.0.1.tgz#d3fc114ba06995a45ec6893f484ceb1d78f5f476"
+  integrity sha512-yPw4Sng1gWghHQWj0B3ZggWUm4qVbPwPFcRG8KyxiU7J2OHFSoEHKS+EZ3fv5l1t9CyCiop6l/ZYeWbrgoQejw==
+
 punycode@^2.1.1:
   version "2.1.1"
   resolved "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz#b58b010ac40c22c5657616c8d2c2c02c7bf479ec"
@@ -945,6 +1035,21 @@ safe-buffer@5.2.1:
   resolved "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
   integrity sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==
 
+"safer-buffer@>= 2.1.2 < 3.0.0":
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
+  integrity sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
+
+sax@^1.2.4:
+  version "1.2.4"
+  resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
+  integrity sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==
+
+semver@^5.6.0:
+  version "5.7.1"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
+  integrity sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==
+
 semver@^7.3.4:
   version "7.3.8"
   resolved "https://registry.npmjs.org/semver/-/semver-7.3.8.tgz#07a78feafb3f7b32347d725e33de7e2a2df67798"
@@ -962,6 +1067,11 @@ setprototypeof@1.2.0:
   resolved "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz#66c9a24a73f9fc28cbe66b09fed3d33dcaf1b424"
   integrity sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw==
 
+source-map@~0.6.0:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
+  integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
+
 "statuses@>= 1.4.0 < 2", "statuses@>= 1.5.0 < 2", statuses@^1.5.0:
   version "1.5.0"
   resolved "https://registry.npmjs.org/statuses/-/statuses-1.5.0.tgz#161c7dac177659fd9811f43771fa99381478628c"
@@ -1008,6 +1118,11 @@ tr46@^3.0.0:
   dependencies:
     punycode "^2.1.1"
 
+tslib@^2.3.0:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.4.0.tgz#7cecaa7f073ce680a05847aa77be941098f36dc3"
+  integrity sha512-d6xOpEDfsi2CZVlPQzGeux8XMwLT9hssAsaPYExaQMuYskwb+x1x7J371tWlbBdWHroy99KnVB6qIkUbs5X3UQ==
+
 tsscmp@1.0.6:
   version "1.0.6"
   resolved "https://registry.npmjs.org/tsscmp/-/tsscmp-1.0.6.tgz#85b99583ac3589ec4bfef825b5000aa911d605eb"