Clear Killing Blow

I have trouble telling when killing blow is able to be used and I know that a few of my friends who struggle with red and greens struggle as well so i made a mod that made them glow bright pink cause its the first "bright" color i thought would be good no matter what colors are hard to tell

If you want any color in particular just say so bellow and ill prob make it lol

note: dark colors sometimes do not show up properly but if you ask for one and i make it itll be as close as i can for it to work and not just make it look like they might be a color lol