Twirl down icons are too small

[AntoniDol]

Increase contrast of binder arrows

Hi. Is there a way to change the colour of the bullet/arrows in the Binder? Those angle things you click to expand or collapse sections/folders. I would like to keep the binder dark but I can barely see the arrows as it is (first image). Even if I do change the binder to a lighter colour (in File Options Binder colours) the arrows aren’t shown. A wider block around them remains the old colour (second image). Thanks (I’m new so can’t upload screenshot yet. Trust me.)