I made a few Happy Birthday cards with the Happy Celebrations stamp set a few days ago using shades of yellow and some Watermelon Wonder for my sentiments.
I chose Crushed Curry, Daffodil Delight and So Saffron for the circle images and stamped several times before reinking to get different shades. The "Happy" was stamped on a scrap of Whisper White and I cut it out with my scissors before adding it with Stampin' dimensionals.
Watermelon Wonder, Crushed Curry, So Saffron, Daffodil Delight ink
Smoky Slate, Whisper White, Daffodil Delight card stock