It would help if I pointed you to the right direction

, for whatever reason I thought you were referring to the action tool bar (like/quote/reply).
That bar is: Style properties -> Editor toolbar background color: Editor toolbar background color
You can darked the background color of this property to make it stand out more if you'd like. I believe... in this next update I've already adjusted the text color of: Editor toolbar icon color
It was using a faint color previously, now it's using: @xf-textColor
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