List as many as possible. This gives you shop more chances of being found. Each listing has to have a title, description, and tags that help you get found. If there is one listing for all those colors, you can't title, describe, and tag the item with color words. Color words are popular especially in Home Decor items. It will take time to creat all the listings, but it's a goal to work towards. Or you can do something in between. Maybe have one listing, pinks and purples, another listing blues and greens, and another in browns and blacks. Just an example of course.