diff --git a/README.md b/README.md
index ffcda46..baca8ab 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,7 @@ The `serve` command is the default command. Running `tailwind-config-viewer` is
 |-p, --port|`3000`|The port to run the viewer on. If occupied it will use next available port.|
 |-o, --open|`false`|Open the viewer in default browser|
 |-c, --config|`tailwind.config.js`|Path to your Tailwind config file|
+|--css|`style.css`| Path to your stylesheet file (CSS). Inject CSS to head element of config viewer. This is handy for defining CSS variables|
 
 ### export
 
@@ -104,6 +105,66 @@ module.exports = {
 
 You can replace any value in your theme for display in the config viewer by setting the corresponding `valueToFind: valueToReplace` in the `themeReplacements` object.
 
+### CSS inject
+
+You can inject CSS file to head of the config viewer. This is useful when you got defined your properties in config as CSS variables, also useful for importing fonts.
+
+For defining variables in dark mode use class name `mode-dark`
+
+```js
+module.exports = {
+  theme: {
+    colors: {
+      'blue-50':  'var(--color-blue-50)',
+      'blue-100': 'var(--color-blue-100)',
+      'blue-200': 'var(--color-blue-200)',
+      'blue-300': 'var(--color-blue-300)',
+      'blue-400': 'var(--color-blue-400)',
+      'blue-500': 'var(--color-blue-500)',
+      'blue-600': 'var(--color-blue-600)',
+      'blue-700': 'var(--color-blue-700)',
+      'blue-800': 'var(--color-blue-800)',
+      'blue-900': 'var(--color-blue-900)',
+      'blue-950': 'var(--color-blue-950)',
+    },
+  }
+}
+```
+
+style.css example
+
+```css
+@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Fustat:wght@200..800&display=swap');
+
+:root {
+  --color-blue-50:  #f0f9ff;
+  --color-blue-100: #e0f2fe;
+  --color-blue-200: #bae6fd;
+  --color-blue-300: #7dd3fc;
+  --color-blue-400: #38bdf8;
+  --color-blue-500: #0ea5e9;
+  --color-blue-600: #0284c7;
+  --color-blue-700: #0369a1;
+  --color-blue-800: #075985;
+  --color-blue-900: #0c4a6e;
+  --color-blue-950: #ffffff;
+}
+
+.mode-dark {
+   --color-blue-50:  #f0f9ff;
+   --color-blue-100: #dbeafe;
+   --color-blue-200: #bfdbfe;
+   --color-blue-300: #93c5fd;
+   --color-blue-400: #60a5fa;
+   --color-blue-500: #3b82f6;
+   --color-blue-600: #2563eb;
+   --color-blue-700: #0369a1;
+   --color-blue-800: #1d4ed8;
+   --color-blue-900: #1e40af;
+   --color-blue-950: #1e3a8a;
+}
+```
+
 ### baseFontSize
 
 The config viewer displays the pixel equivalent of any rem values. By default `baseFontSize` is set to 16 to mirror the default root element font size in most browsers. If you plan on using a different root font size in your project, you should set the value of `baseFontSize` to match.
diff --git a/cli/index.js b/cli/index.js
index dd71566..9ea5f7f 100755
--- a/cli/index.js
+++ b/cli/index.js
@@ -1,9 +1,12 @@
 #!/usr/bin/env node
 const { pathToFileURL } = require('url')
 const { resolveConfigPath } = require('../lib/tailwindConfigUtils')
+const { readFile, access, constants } = require('fs/promises')
 const program = require('commander')
+
 program
   .option('-c, --config <path>', 'Path to your Tailwind config file', './tailwind.config.js')
+  .option('--css <path>', 'Path to your CSS style file', './style.css')
 
 program
   .command('serve', { isDefault: true })
@@ -20,6 +23,15 @@ program
         const config = await import(configHref)
         return config.default || config
       },
+      cssProvider: async () => {
+        const filePath = program.css
+
+        try {
+          await access(filePath, constants.F_OK)
+          const styles = await readFile(filePath, 'utf-8')
+          return styles
+        } catch (err) {}
+      },
       shouldOpen: args.open
     }).start()
   })
diff --git a/public/index.html b/public/index.html
index cadf49c..8d11234 100644
--- a/public/index.html
+++ b/public/index.html
@@ -9,7 +9,8 @@
   <title>tailwind-config-viewer</title>
   <script>
     window.__TCV_CONFIG = {
-      configPath: './config.json'
+      configPath: './config.json',
+      cssPath: './style.css'
     }
   </script>
 </head>
diff --git a/server/index.js b/server/index.js
index 9918a3b..bc4ac92 100644
--- a/server/index.js
+++ b/server/index.js
@@ -8,6 +8,7 @@ const { resolveConfig } = require('../lib/tailwindConfigUtils')
 function createServer ({
   port = 3000,
   tailwindConfigProvider,
+  cssProvider,
   shouldOpen,
   routerPrefix = ''
 }) {
@@ -20,6 +21,12 @@ function createServer ({
     ctx.body = resolveConfig(config)
   })
 
+  router.get('/style.css', async (ctx) => {
+    const stylesToInject = await cssProvider()
+    ctx.type = 'text/css'
+    ctx.body = stylesToInject
+  })
+
   app
     .use(serve(`${__dirname}/../dist`))
     .use(router.routes())
diff --git a/src/App.vue b/src/App.vue
index 2e80129..9205369 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -42,6 +42,8 @@ export default {
 </script>
 
 <style>
+@import url('/style.css');
+
 body {
   @apply bg-white;
 }