COLOURED SURFACES.
The wavelengths reflected by a surface determine the colours that humans perceive. For example, a green plant only reflects the green wavelengths and absorbs all the others. Thus, the plant appears green.
When coloured light falls on a white surface, it completely reflects the incident light and takes on the colour of the light. That is why a white wall appears reddish when illuminated red. Illuminating a coloured surface with coloured light creates mixed
colours.
When furniture fronts or a wooden floor are illuminated, they reflect shades of brown that bathe all neutral surfaces, such as a white ceiling or wall, in a warm tone.