Change overall colour while maintaining proper white balance on subject

This method lets u have the overall photo of a colour you want, while maintaining a white balance on the subject.

Use colour filter in front of lens. 

Take example, use red filter. Overall picture will become red. 

Use the a flash that can do focused light with the opposite light colour filter to hit on subject. From the colour chart below, we should use cyan. 

Red + Cyan will give you white. And therefore helps to adjust the colour balance of the subject back to white.

*Bonus: Put a white board infront of the subject to test the white balance.

*Focused light mentioned here refer to using softbox or firefly so that the light wont be too dispersed adn spread to the surrounding. Can try setting the flash to zoom in too.