I think the great thing about this colour palette is that you can mix it up for your bridesmaids; let them choose their own styles in a range of shades and have fun accessorising
Lots of great invitations can be found using the peacock as inspiration, here are a couple I found on Etsy.
Peacock place cards from Etsy shops Timeless Paper
A peacock on a cake might be a bit much but I like the use of jade icing detailing on this cake.
Cake Inspiration here, via Elizabeth Anne Designs photo by Laura Peacock (the name is a coincidence I promise.)