ensure --color-\*: initial; works

Author: RobinMalfait

packages/tailwindcss/src/theme.ts

@@ -41,6 +41,10 @@ export class Theme {
   ) {}
 
   add(key: string, value: string, options = ThemeOptions.NONE): void {
+    if (key.endsWith('-\\*')) {
+      key = key.replace(/-\\\*$/, '-*')
+    }
+
     if (key.endsWith('-*')) {
       if (value !== 'initial') {
         throw new Error(`Invalid theme value \`${value}\` for namespace \`${key}\``)