Like a few others here I splashed just a few drops of bleach, this time on my good Christmas top: black velvet-like fabric with beautiful embroidered pictures on it. (That's what happens when you anticipate Monday morning washing by putting things to soak on Sunday night.) So I used the Sharpies, which covers it up....until I wash it a few times. Then it looks kind of gray. So I have to renew the Sharpie every year when I want to wear the top.
Of course if you got some black Sharpie on white, it would never wash out! LOL Murphy's law!