50. The picture molding may harmonize with the ceiling. Indeed, a white picture molding frequently is better than one matching the general woodwork (See [¶ 37]); a dark upper molding, moreover, reduces the apparent size of a room.
51. Where black furniture is used, or gold furniture, it will of course be understood that the wood trims shall not be black or gold; but so long as they are in harmony, that will be sufficient. White wood trims are nearly always permissible as a substitute for colored wood.
52. Tones of gray with soft colorings (See [¶ 32]), are always safe.
To summarize (Note [¶ 37]):
53. In harmonies of contrast the side-walls, the furniture woodwork, wood trimming, cove, ceiling and the curtains should be related.
54. The rugs, frieze, wainscoting or dado, furniture upholsterings and the curtain borders should be related. (See [¶ 49].)
55. If the curtains have no borders, then the curtains contrast with the wood trims.