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Detail of a mural from an Eastern Han tomb near Luoyang, Henan showing a pair of Liubo players, containing both Han blue and Han purple pigments. Han purple and Han blue (also called Chinese purple and Chinese blue) are synthetic barium copper silicate pigments developed in China and used in ancient and imperial China from the Western Zhou period (1045–771 BC) until the end of the Han ...
For practical additive color models, an equal superposition of all primaries results in neutral (gray or white). In the RGB model, an equal mixture of red and green is yellow, an equal mixture of green and blue is cyan and an equal mixture of blue and red is magenta. [1] : 4.2 Yellow, cyan and magenta are the secondary colors of the RGB model.