Have to be in forest green, and with the guests maybe a little white with black, as well forest green

Just give yourselfs a little specialty to show who you are in the role

If your a groomsmen wear a bracelet that's black

If your bridesmaid 

Wear a purple bracelet 

If your the officiant 

Wear a white bracelet 

Ring bearer

Wears a yellow bracelet 

Flower girl/boy

Wears a light green bracelet 

Parents are allowed to have a red bracelet