At the end of the day, nobody is going to remember that one bridesmaid's dress was a slightly lighter shade of "April Lavender" than everyone else's. Not a single guest is going to pay attention to the fact that the center pieces are a little bit too high, the flower arch at the ceremony wasn't fully filled in, or that the cake was actually originally supposed to have raspberry planning. And, although it is nice for the couple to look back on their photos and remember their big day, asking a guest to dye their hair or change their appearance in any way so that the photos are "perfect" for the 2 times in a decade you look at them, is ridiculous. In the frenzied chaos of planning every delicate detail, many couples forget that the reason they're actually doing it all is to celebrate the commitment they're making to each other.