This illustration was done by KurooBaSF on Deviantart they use digital media for their artworks. Using a limited color palette is a challenge I’ve seen artists take up and do for fun. In this artist case, they decided to give it a try using a palette with analogous cold colors. One the top left showing the colors used. Giving a chilling effect, and having a winter like setting. I think it is effective because despite giving a chill full view it also looks fun, with the motion and expression of the character.