I used colors that are sort of light, springy, and pastel, but a bit brighter. I also wanted them to be a little darker so the white designs would contrast better as well.
For my colors, I used Rainbow Honey Viola (purple), Tayabak (green), and Cymbidium (pink), along with China Glaze White on White for the designs. Viola is a bit less bluish-purple in person, and is a little brighter, but it's close in these photos!
I wanted to do a bit of a sponge gradient, so I started by painted all of my nails purple with Viola. I then sponged on Tayabak with a makeup sponge, and when that way dry, I sponged on Cymbidium toward the tips. While the effect isn't exactly a gradient with my contrasting color choices, it almost looks like speckled or watercolored Easter eggs, so I like it!
When the sponged colors were dry, I freehanded some white zigzags and also added some dots with a dotting tool. While the zigzags aren't as perfect as they would have been with decals, tape, or a stamp, I like it! I usually don't mind if the outcome is a little off, as long as it was fun to do!