Use your imagination and rely on textures and layering from things in your stash such as embossing folders, stitching, frame and image dies, doilies, other white embellishments, etc. As an exception, you may use black or a choice of one other color for the sentiment and/or for a minimal splash of color. Just keep your project predominantly white.”
"For 'Rainbow of Color' you are free to use the Traditional RYOGBV. However, you are not limited to a traditional palette. Feel free to use a pastel palette OR a neon palette of rainbow colors."