I went to a technique-based card workshop this week, and one of the techniques we did involved using colorwash spray (Splash, from a•muse studio) as a watercolor medium, poured out of the bottle and into a palette, applied with a brush. This is the card (the graininess is glitter):
When I got home, I showed it to my 24yo son Gordon, and asked him if the little bit of color on the inside was a problem, or if it just made it more "homemade". He looked at it, and told me that he had seen me make a lot of intricate cards with layers and fancy cutting, and that he would feel insulted to get a card from me that was just 5 stripes.
So, I cut the front off and reworked it into the following card.