[Bug Report][3.6.8] Custom colors transparency/opacity is ignored

[simionato-mobisec]

Environment

Vuetify Version: 3.6.8 Vue Version: 3.4.27 Browsers: Firefox 126.0 OS: Ubuntu undefined

Steps to reproduce

1. Create a custom theme.
2. Create a color named "test" with a value of "#ff000014".
3. Change VTextField defaults and set its color prop to "test".

Expected Behavior

The focused text field should have a transparent red color.

Actual Behavior

The focused text field has a red color, transparency is ignored.

Reproduction Link

https://play.vuetifyjs.com/#...