Use the colour wheel as the basis for a single colourfull illuration that could be tessellated across the wrapping paper? color theory chart - beautifully simply way to learn this (plus the fact that I suck at combining colors LOL!
HUES are the 12 purest & brightest colors with Primary Colors, Secondary Colors, and Tertiary Colors. TINTS (aka Pastel) is any color with white added. SHADE: any color with black added. TONE: is created by adding gray.