The most common blues, Prussian blue and ultramarine, are also inorganic. 黄或栗色。铁蓝或称普鲁士蓝,是主要的无机蓝色颜料。
Blue ones, ultramarine, azurite ( 2CUCO_3 · Cu ( OH)_2), dark blue ( an amorphous arsenide of Fe, Co, Ni), indigo; 蓝色颜料为群青、石青(2CuCO3·Cu(OH)2,亦蓝铜矿)、藏青(一种无定形的Fe、Co、Ni的砷化物)、靛青;