I don't buy into many of the standard statements about what colors mean. But anybody, other than that 10% of men and 1% of women who are color-blind, will have very different reactions to a gray background versus a bright red one. At the school where I taught photography briefly, there was a bright red brick wall. Students would use it for a background at times, and the photos always came out extremely graphic and strong. So I decided to include a "bracket" of the background color.
You can have fun by partially sliding between the photos and creating your own color blends.
These are camera originals — we didn't switch the background colors in computer. Helper Mike swapped in and out colored papers behind Nicole.
Bottom Line: Consider the power of a flat, strong, color background.
100mm, f19, studio softbox at left, reflector on right