fix: check if is color before changing colors

package.json

@@ -18,6 +18,7 @@
     "@vueuse/core": "^12.2.0",
     "chart.xkcd": "^1.1.15",
     "comlink": "^4.4.2",
+    "hex-color-regex": "^1.1.0",
     "modern-screenshot": "^4.5.5",
     "pinia": "^2.3.1",
     "random-js": "^2.1.0",
@@ -26,6 +27,7 @@
   },
   "devDependencies": {
     "@faker-js/faker": "^9.4.0",
+    "@types/hex-color-regex": "^1.1.3",
     "@types/node": "^22.10.2",
     "@vitejs/plugin-vue": "^5.2.1",
     "sass": "^1.85.0",