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All colours will agree in the dark.
It is not unusual to hear said of textiles and embroideries, "I like soft quiet colouring; such and such is too bright." This assertion is both right and wrong; it shows an instinctive pleasure in harmony combined with ignorance of technique.
To begin with, colour cannot be too bright in itself; if it appears so, it is the skill of the craftsman that is at fault. It will be noted in a fine piece of work that far from blazing with colour in a way to disturb the eye, its general effect is that of a subdued glow; and yet, on considering the different shades of the colours used, they are found to be in themselves of the brightest the dyer can produce. Thus I have seen in an old Persian rug light and dark blue flowers and orange leaves outlined with turquoise blue on a strong red ground, a combination that sounds daring, and yet nothing could be more peaceful in tone than the beautiful and complicated groups of colours here displayed.
Harmony, then, produces this repose, which is demanded instinctively, purity and crispness being further obtained by the quality of the colours used.