Twilight Sparkle is a beautiful purple horse with a majestic mane and tail that flow in the wind. Her saddle and bridle are a bright pink and purple color that adds vibrancy to the painting. On her forehead is a bright blue gem which glitters in the light. To bring the picture to life, I recommend complementing Twilight Sparkle's purple coat with light pastels, like baby blue, lemon yellow and pale pink on the saddle and bridle. The gem could be highlighted with an electric blue or even a glossy diamond sparkle. With these colors, the painting will come alive and capture the true beauty of Twilight Sparkle.