3 issues to address:
1) In the dark theme palette, 2 colors need to be added to the 'Background and Borders' set:
2) In Light theme > Buttons and app-level alerts
The color #CCCCCC is labeled with white text. It should be black text
The green #318700 is labeled with a white "A" on the left side. It should show both a white and a black "A" to denote that both text colors are accessible on it. See attached image for details
IMAGES for issues above:
Issue 1:

Issue 2:

Issue 3:

I have a question about issue 3. The 48px margin, that needs to be reduced to 36 px is coming from a global style for all _h6_ elements on the site. Changing it will have effect on many places. For example, the vertical spacing between cards lower on the same list, will also be reduced.
My suggestion is to stay safe and only add the margin preceding the tab labels and leave the ones below them as they currently are. Any attempt to fix the local instance only will lead to complications, or hacky solutions.
Please, advise.
Btw, the current margin (below labels) is not 0, it is 12px. So we'll have the same margin1 + margin2 total value. I can safely change this one to 24px, as requested, but we may get too large whitespace there on the light theme (+12px compared to now).
Light theme example:

Hi @Jinnie
Thanks for explaining the problem with issue #3. Let's go with your suggestion.
@Jinnie
The white space in the light theme example above looks good to me. Now there's enough space around the tabs that it doesn't get lost in the page. Thanks!
Hi there 馃憢, this is an automated message. To help Clarity keep track of discussions, we automatically lock closed issues after 14 days. Please look for another open issue or open a new issue with updated details and reference this one as necessary.
Most helpful comment
318700 will be globally substituted to #2F8400, as requested in #2535, and it will remain accessible only against white.