In African culture you choose wedding colours, which will be your theme for the day and also the accent colour which guests can wear also.
Our wedding colour is purple. I've always liked it as colour and there are so many variations on the shades that it comes in. I am attending one other wedding this year and as far as I'm aware, purple is not being used by the other bride. Our bridesmaids and groomsmen will have elements of purple in their outfits to tie everybody in together.