Wear White

Wear White
We don't care if it's the middle of summer and your little white sundress is the most flattering thing in your closet. Do not, we repeat, do not wear white to someone else's wedding. Most brides have been looking forward to their moment in the spotlight — as the only one in white. While it's true no one could possibly upstage the bride, it's considered the ultimate guest dress no-no. The other color to avoid wearing at a wedding? Bright red.
Instead: Colorful tones like pinks, yellows and purples are all fair game. Just stay away from anything in the white and ivory color family.
Totally Ruined Wedding Scale