I have a standing order for a Mother's Day card with a rainbow on it. After sending him ideals and getting a feel of what he wanted I found inspiration for V1 and V2 cards on Jennifer McGuire's blog...found here https://www.jennifermcguireink.com/2017/04/rainbow.html
He chose V1.
May 2020 Inspirational Card Challenge - Product Category - vellum
Cardstock: Bazzill (scraps in all colors)
Metal Dies: Memory Box (Flicker Hearts), Lawn Fawn (LF492 Hearts), Lawn Fawn (Mother's Day Border)
Accents/Tools: Hobby Lobby vellum, Xyron X,