fix(colorutils.ts): lookbehind regexp causing FF throw error (#11215)
fix(colorutils.ts): lookbehind regexp causing FF throw error (#11215)

fixes #11214

Firefox wil not load application because of error on regexp with lookbehind part
vuetifyjs/vuetify,vuetifyjs/vuetify,vuetifyjs/vuetify,vuetifyjs/vuetify