Sonic is running through a lush green field, with the sun beaming down from a bright blue sky above. His eyes are fixed on something ahead of him, a look of determination etched onto his face. His arms are outstretched, one hand in front of him and one behind him - as if to hold onto his momentum. To color this picture, try using a range of greens and blues to bring out the beauty of the environment. The trees and grass should be vibrant, while Sonic's bright red also stands out. The sky is a great opportunity to use light blues, purples and pinks to depict the setting. Finally, Sonic himself should be in darker colors to contrast against the bright colors of the environment.