Hey, I found this really awesome Etsy listing at https://www.etsy.com/au/listing/266501918/rainbow-gold-1st-birthday-invitation
Rainbow Birthday Invite
Rainbow invitation Printable Colorful by TheLovelyDesigns
Google Image Result for http://2.bp.blogspot.com/-JzPPF-XLft0/UBYIQbhYaAI/AAAAAAAABuE/k2HIMRb09mU/s1600/IMG_5734%2Bcopy.jpg
Party invitations for a Rainbow themed birthday party. Designed and created by Distinctive Party Designs.
Rainbow Birthday Invitations Templates
Rainbow party, how have I not thought of it before??
Colorful Rainbow Birthday Party Invitation -- PRINT YOUR OWN -- Any Color on Etsy, $12.99
Rainbow Birthday Party Invitation Chevron by LilFacesPrintables, $10.95
Fun idea for invitations | Rainbow Themed Party! | BrightNest | Paint Chip Projects for Color Lovers