2/10, but one of them took a lot of staring and a little guesswork. I think it really hampers my F2L, I can sometimes spend 4-5 seconds looking for a single edge.
Well that's a problem but you could do some customization so that you would not have a problem with it. I do not know if they accept color customized cubes for competitions though. Maybe you could search through the internet and pick through 6 distinct colors you could tell apart and use that for your cube. Good work though for having a fast time. You could do better than most who are not colorblind.