Tabs focus outline color for g90 and g100 is incorrect

Detailed description

We are in the process of verifying Carbon X components against our dark UI (using g100 theme, specifically) and with the Tabs component our designers flagged some colors that needed attention.

Here are some screenshots with the Tabs in a g100 theme (though g90 would be similar):

And here’s a table showing which colors were flagged (note: these are for g100 but g90 would be similar):

Desc	Current color in g100	Expected color in g100
Highlighted blue line for active	blue60 ($interactive01)	blue50
Focus outline	blue60 ($interactive01)	blue50
Non active underline	blue60 ($interactive01)	blue50
Tab item text	gray30 ($text02)	gray10

So do these expected colors make sense to you all? (cc @IBM/carbon-designers)? And if so, what should the tokens be changed to to look better for g100 (and likely g90) themes? Looking at the @carbon/themes preview, nothing immediately stands out to me https://carbon-elements.netlify.com/themes/examples/preview/ Thank you!

[aagonzales]

At the moment we have $interactive-01 as Blue 60 in both dark themes. I think we’ll need to talk to Mike and Sadek about changing it to Blue 50

[jendowns]

Reopening because it looks like in v10.3.1 the focus color does not match what is posted in this screenshot: https://github.com/carbon-design-system/carbon/issues/1757#issuecomment-468451264 (focus color should be white, but appears as blue60)