It's up to you to decorate the front with the main color and the back with the auxiliary color.
1, crimson and green plants or vice versa.
2, goose yellow with elegant white
3, bright yellow with brown
4, bright yellow with grass green
5, red with China black.
6. Red or bright yellow with medium gray
7. All white with green plants (preferably embellished or blended with brown)
8. Don't forget the red and white classics.
9. Sapphire is bright yellow or vice versa.
10, use the log color to make a whole bright color.
Make up your own mind about daylighting and lighting.