HASHTAG CHALLENGE: Rainbow. Ready for more #Hashtag Challenges? All your favorite princesses need your help in this awesome challenge. You'll have to dress them all according to each color of the rainbow, do you think you can do it? Let's play! Dress the 7 girls in the seven colors of the rainbow: red, blue, green, orange, yellow, violet and indigo. An online dress up game with a built-in challenge for more fun.