Pretty self-explanatory. Just as how the hitcircle.png is tinted based on combo color, there should be a skin.ini toggle (such as SliderReverseArrowTint) to tint the reverse arrow as well. IMO this would look better on skins with transparent sliderendcircle.png
Here, I made a mockup using some custom reverse arrows:
What do you think?
Here, I made a mockup using some custom reverse arrows:
What do you think?