Thoughts on hair color/dye?

Sarah
Has anyone dyed their hair during pregnancy? I was before (always at salons) and stopped as soon as we were trying, but now they greys are really starting to bother me (I have dark brown hair so it's noticeable). I looked into organic dyes but they have mixed reviews? A lot of what I read is that it is safe this far in but I am still weary or the chemicals.