Flourishes is coming out with another new set of stamps and they've issued a challenge of Blue & Yellow combo to symbolize - Sky and Sunshine. If you enter the challenge you could win the set...
Keeping my fingers crossed.
Click on card to see details etc.
It also covers a couple other challenges:
Pink Elephant #69 Bright fun colors
Charisma Cardz #22 Flowers
Scrap Your Crap #54 Use any coloring media (Prisma Colors for the flowers & Distress stamp pads for the background and oval)