How to change bgcolor of active tab in chrome/chromium?

This question complements the question How to change web browser's tab bar background color or image?

It seems changing the whole tab bar bgcolor is not difficult, but how about changing the bgcolor of the active tab?

It's especially necessary when you choose light monochrome icons for your dark theme, i.e. when those light icons are difficult to see in the active tab, toolbar, etc. of chrome/chromium, as seen in the screenshot below.