Could you please make 'Active Vertical Tab' appears brighter?

[ttomomo]

(Version 3.12.1) There is no distinction between the appearance of the 'active' and 'inactive' tabs in the Vertical Tab. (The 'active tab' apears much brighter when using the horizontal tab bar at the top).
Could you please make the 'active' vertical tab appears brighter?

[catsxp]

Please try switching themes with high contrast

[ttomomo]

That's OK after using a high contrast theme. Thanks.