Refresh Tab Group colors

[cbeach47]

With the re-introduction of tab groups into uPortal, the coloring / skinning around the tab groups could use some rework.

• Review the current tab group skinning and less variables around these elements
• Update the default skin to have a demoable / quickstart color set

[555vedant]

can you describe more about this issue
i am ready to contibute for this

[ChristianMurphy]

@555vedant I'd recommend starting with #2287

[555vedant]

what you mean shall i start with #2287 ??

[ChristianMurphy]

I mean that the task labeled "good first issue" is a good first issue, and that you volunteered to do that two weeks ago, but haven't opened a PR yet.
Finish that before asking for details on other issues.

[555vedant]

@ChristianMurphy i will definetly work on it for sure