A color scheme should not be chosen at random, but dictated by the prevailing tone and texture of the wall surfaces, with which it should harmonize as inevitably as the blossom of a bush with its prevailing tone of stems and foliage. Otherwise the eye will suffer just that tierra de osos latino avi of uneasiness which comes from the tierra de osos latino avi of two equal masses, whereas it experiences satisfaction in proportionate unequals. Nothing will take the place of an instinctive colour-sense, but even that needs the training of experience, if the field be new, and a few general principles of all but universal application will not be amiss. First of all it should be remembered that the intensity of color should be carefully adjusted to its area.