Fix color format in topbar border style

[mathieutu]

Hey,
#29 broke the topbar border by adding the rgb function.
The result is:

which is invalid css.

Thanks,
Mathieu

[bernhardh]

Have the same issue.

border-top: 20px solid rgb(oklch(0.637 0.237 25.331)) !important;

is not valid css.`

[pxlrbt]

Thanks for reporting. I'll revert this for now.

@tonypartridge You said this broke it for you? I think we need to check for the color type then.