We touched on colour within Atmosphere above, and how the colour of white light (warm or cool) can have a determining effect in the overall mood of a space. Colour is a much broader topic and we should look at a few other aspects too. The colour of surfaces and materials within the space must be understood well, or at least open to being influenced, before the lighting design can be fully developed. Consider the difference between a space with a white or limestone floor against another with a black or grey slate floor. The colour of walls too is critical: darker colours reflect less light, so you might have to increase lighting to specific parts of a space to get an equivalent feeling of brightness, and as we know from the section above, the perceived brightness of surfaces determines our overall perception of brightness. Of course, colour can be delivered by the lighting, and to very dramatic effect, but keep it simple. Tutti Frutti is not a good look for most environments.