This small group of individuals represents the entirety of the beloved Shrek movie. From the top of the frame, all the way down, the director, producer and main actors, each wearing vibrant colors, are celebrating and enjoying themselves.
I suggest coloring the characters using different shades of green. Shrek himself could be painted a deep, forest green with lighter hints of olive and lime on his features. The Ogre children can be dressed in vivid greens and yellows, while Fiona can don a beautiful emerald gown. With their vibrant clothing, the characters will all stand out as they bask in the glory of the movie's success. For the background, I suggest using a soft pale yellow, which will give the page a sense of warmth and joy.