Orange (colour) colours on a television or computer screen), orange is generated by combining high intensity red light with a lower intensity green light, with the blue light turned off entirely. Orange is a tertiary colour which is numerically halfway between gamma-compressed red and yellow, as can be seen in the . Regarding painting, blue is the complementary colour to orange. As many painters of the 19th century discovered, blue and orange reinforce each other. The painter Vincent van Gogh wrote to his brother Theo that in his paintings, he was trying to reveal "the oppositions of blue with orange, of red
Colour whist Colour whist Colour whist ("whist à la couleur" or "whist belge" in French or "Kleurenwiezen" in Dutch) is a Belgian variation to the card game whist. In contrast to the normal game of whist, the trump colour is determined by a bidding process rather than being the last card on the stack. The trump is determined during a first phase in the game. A player "asks" for a colour, and the next players can pass, join him, ask another colour or ask another game. The colours have a hierarchy: hearts is the most valuable, followed by diamonds, followed by clubs