Karkat’s association with the colour gray (his pants, skin colour, symbol) helped him overcome Clover during Collide, because just like with rolled-up papers, you don’t have to be particularly unlucky to be beated by an angry Cancer troll.
DAVE: john you wanna eat a pizzer JOHN: sure thing, dave! DAVE: i think we should go to... JOHN: huh? DAVE: double daves! JOHN: ... DAVE: get it cause my names dave... and... fuck forget it JOHN: how about we go to... JOHN: PAPA JOHN'S INSTEAD! DAVE: goddamnit john!