509. LUSTRELESS WHITE, such as cambric muslin, assorts well with a fresh complexion, of which it relieves the rose colour; but it is unsuitable to complexions which have a disagreeable tint, because white always exalts all colours by raising their tone; consequently it is unsuitable to those skins which, without having this disagreeable tint, very nearly approach it. 510. VERY LIGHT WHITE draperies, such as muslin or lace, appear more grey than white. (See 503.) We must thus regard every white drapery which allows the light to pass through its interstices, and which is only apparent to the eyes by the surface opposed to that which receives incident light. 511. BLACK draperies, by lowering the tone of the colours with which they are in juxtaposition, whiten the skin; but if the vermilion, or rosy parts, are somewhat distant from the drapery, it will follow that, although lowered in tone, they appear relatively to the white parts of the skin contiguous to the same drapery, redder than if not contiguous to the black. This effect is analogous to that mentioned (385). _The Head-dress in relation to the Coloured Rays which it may reflect upon the Skin._ 512. The effect of coloured bonnets on the complexion can now be readily understood; and whether it is true, as is generally believed, that a rose-coloured bonnet gives a rose tint to the skin, while a green bonnet gives a green tint to it, in consequence of the coloured rays which each of them reflects upon it, it is no longer a question about those head-dresses which, being too small or too much thrown back to give rise to these reflections, can only produce the effects of contrast, as I have said above, when treating of the juxtaposition of coloured objects with the hair and skin (501, _et seq._) 513. If an object in relief is illuminated exclusively by a coloured light, it will appear tinted with the colour of this light. A white plaster figure, for example, placed in an enclosure where the red rays illuminate it, will appear red, at least to most eyes, and under most circumstances; for certain eyes, in some cases, may perceive the sensation of the complementary of the coloured rays in looking at some parts of the figure. 514. But if the figure is placed so as to receive, at the same time, coloured rays and diffused daylight, there will be produced on the eyes of a spectator, suitably placed, a complex effect; resulting— 1. From some parts of the figure being white, reflecting to the eyes of the spectator the coloured rays falling from above. 2. From some parts of the figure reflecting diffused daylight in sufficient quantity to appear white, or almost white. 3. From there being between the parts which reflect coloured light to the eye, and those which send diffused daylight, some parts in a condition which appears to be complementary to the reflected coloured light.