Weddingbee boards

Hello everybody!  I'm torn about colors for my bridesmaids dresses.  I'm trying to do multiple colors.  I have 7 girls in the bridal party.  My first thought was red, orange, and fuschia but that was quickly forgotten b/c there was no TRUE RED that I loved.  So then I started looking at other 3 color combinations...my favorite so far (only looking online and not yet in person) is a deep violet, fuschia, and lime green.  Looks awesome paired together in pictures...we'll see what I think in person.  THEN...someone mentioned doing the rainbow palette and going specifically with ROYGBIV!  I've been laying it out with samples online but I was wondering if anybody has used that many colors and how it looked.  Or...if you've found any good pictures online where someone used this idea.  I was bright, vibrant colors!

Another tidbit...we're getting married in a garden...will that be TOO much color going on!?!?!?!?

Please post pictures if you happen to have any or see any!  Thanks so much...I need to start making decisions and I think the "expertise" on these boards will be very helpful :)