[BUG] New graphics don't work with CSS colors

[dnmeid]

Make sure you're on the latest stable or beta build

• I have tested this on the latest stable or beta release

Is this a bug in companion itself or a module?

• I believe this to be a bug in companion and not a specific module

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Since version 1.6.0 of the base module we support CSS color strings as color values.
They seem to be broken with the graphics overhaul.
Elements using a CSS string are not rendered correctly and when switching a color option to expression mode a CSS string is not accepted.

Steps To Reproduce

No response

Expected Behavior

Should work with CSS strings.

Environment (please complete the following information)

- Companion Version: 5.0.2
- OS: any
- Browser: any

Additional context

No response