Trying to use any kind of dark color scheme, the thumb (draggable box) within the right scrollbar becomes invisible against the dark background.
I did find a Komodo X customization tutorial. It mentions installing 2 add-ons, DOM Inspector and Element Inspector. However, after installing these add-ons, I don't get the CSS rules option mentioned in the 3rd-ish step.
This posting mentions using the Stylish add-on to change the scrollbar color but Stylish isn't yet compatible with Komodo X, apparently.
I tried using the editor mini-maps for scrolling which worked marginally well, but the width of the mini-maps changes (too fat or too thin) over time (at least with the split view panes) making their use inconsistent.
All I really want to do is change the thumb to a lighter color then I'm back in business.
In the meantime, I'm using a light colored background which is hard on the eyes.
Any pointers/tips/help would be greatly appreciated.