I chose not to colour my hair, even tho my HD said it would be safe. I think too that you need to be careful that your skin/scalp isn't more sensitive during pg. I think it worried me more that it would burn my scalp or something.

ETA. I think it's interesting that people who assure us that colouring is safe then go on to say that foils are better because they don't touch the scalp?? So then ones that DO touch the scalp must be less safe afterall? Like I said, I chose not to colour. Mind you.. our pg was planned, so before hand I had my hair dyed to a colour that wouldn't show the regrowth as dramatically.