This beautiful sets of color schemes are the natural results of neutralizing colors by mixing them with their respective complementary.  Hence, to "tone down" a color, you must mix it with its complementary.  To obtain a wider palette of these colors, get tints (color + white) or shades (color + black.)

Many artists used this scheme to paint preliminary studies of paintings or to convey a soft, earthly atmosphere  to their compositions.

The Ocean, by James McNeill Whistler, 1866. Oil on canvas The Frick Collection	Tobit accuses Anna of stealing the goat, Rembrandt, 1645, Oil on panel Private Collection

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