priority where sunlight enters the building – on walls or ceilings, or both – because they reflect better and thus distribute daylight throughout the home's living areas. Darker colors further away from the light source can still absorb heat from this reflected light, though less efficiently.

Your color choices depend very much on personal taste, though it is almost always best to opt for a dark-colored floor. Since the floor gets much more direct sunlight than most walls, optimizing its absorption and heat retention is a real priority.