well it's supposed to be the "passive" you (or "indeterminate" you)

but I think anyone can learn to notice the pattern of comics with this particular odd color style ^(assuming^ ^you^ ^would^ ^want^ ^to^ ^learn^ ^it^ ^for^ ^some^ ^reason,^ ^and^ ^if^ ^we^ ^ignore^ ^color^ ^blindness^ ^or^ ^other^ ^similar^ ^problems^ ^etc)^

The old way of saying that is close to obsolete. One now must take it from context whether the "you" means you or one.