Background color
Choosing the right background color for your painting is as important as the color of your foreground subjects. Your background should bring out your subject (focus or foreground of your painting ) and not overshadow it or take the attention from it. Unless you’re doing ‘still life’, or abstract and just a beginner, go by this rule. Now, should you do the background first or last? It depends on what’s more convenient for you, there’s really no rule regarding this.