What do you think about this? too y or too red?

I don't think its too y but I don't think its appropriate to wear a fire engine red dress to a wedding. Its like you're trying to get attention. I think the blue would be nicer. Its up to you though, if you're not worried about what other people (including the bride) might think then wear whatever you want. I just prefer to side on the conservative end to be respectful of the bride on her wedding day.