These are some quick notes. If you’ve got questions about shading/colors lemme know I’ll edit the original post.
When making a piece I always want to make sure the overal rendering is good. Eyes are drawn to contrast. When you pick your colors make sure there are enough pleasant hues, enough contrasting values, and ENOUGH SATURATED AND DESATURATED COLORS
When you choose to do high saturated flat colors make sure your shadows and lights are desaturated. If you make your lights warm make your shadows cool. For values always check if your piece still looks appealing under a black and white gradient filter. If not, bump up those values! If your piece looks fine in black and white but trash in color HANDLE YOUR SATURATION.