Some tips for people who don't know what to do with their colors and want to learn more about how to properly apply them to their sprites: http://paletton.com/ is a very good website to come up with color schemes! You can mess around with settings and create a color palette this way that you can potentially use for a shiny sprite. Don't use overly saturated colors -- they hurt the eyes... Especially if you put clashing colors next to each other. What are clashing colors?