Tuxes and bridesmaid dresses

So for our wedding are colours are mint, champagne, and grey. The bridesmaid dresses are more of a minty green than I minty blue (surprisingly minty blue was hard to find in a dress everyone liked). Anyway, the tuxes are more on the blue side. So we've decided to do grey on grey with a mint tie as opposed to the vest and tie mint. Anyway there is a slight difference in the colour of the dresses and the ties. My one bridesmaid made a big deal that they dont match completely and told me its going to look off, now im second guessing and stressing. I was just wondering what other peoples opinions are on the topic so I can stop worrying.