How do paint colors affect the room temperature?
The paint color probably doesn’t have a huge physical effect on room temperature overall. However, when there is plenty of light in the room, darker colors will absorb more light and convert that to heat so there could be some effect. There might actually be larger perceptual effects. Some colors are perceived to be cooler than others (but this will vary from person to person) and therefore people might feel that the temperature is higher in a red room (a warm color) than a blue room (a cool color). I have heard that this perceptual effect can be significant (and applies to lighting color as well).
