White is known to have a cooling effect and therefore seems ideal for hot countries. According to colour psychology, white also epitomises the values that are needed in a school; namely cleanliness, order, lightness, objectivity and clarity.
But the psychological effects of colour didn't reckon with the effects of Nigerian soil, which is mostly red or black. Even the country's emblem has black to represent "the good earth". But that makes it difficult to keep white buildings clean.