I assume that you are the bridesmaid because you are looking out for a colorful gown. Well, it is generally seen that bridesmaids wear blue, peach or yellow-colored gowns. However, to precisely decide upon the color of your gown, you first need to decide the style of your dress.
That is only when you will realize if the color is matching the style of not. However, if you are not sure or if you are holding any doubts about it then it is advisable to make a trip to a highly reputed bridal dress shop such as OSTTY as there you will get to see extensive dress options, as well as the fashion experts there, will help you chose a dress that will suit you best. Also, before making a trip to a shop, be sure you read up a little on How to Find the Perfect Bridesmaid Dresses.