Yellow orange, transmitted by unequal units of red and yellow, yellow preponderating.
Yellow green, transmitted by unequal units of yellow and blue, yellow preponderating.
Blue green, transmitted by unequal units of yellow and blue, blue preponderating.
Blue violet, transmitted by unequal units of blue and red, blue preponderating.
Red violet, transmitted by unequal units of blue and red, red preponderating.
C.—Any of the above colours with the addition or subtraction of neutral tint.
Neutral tint itself, is transmitted by a combination of equal units of the standard glasses, thus three units red, yellow and blue, when superposed, transmit three units neutral tint.
Examples.
Three units red, of standard brightness, completely describes a colour matched by a red glass of three units, and is denoted
R. 3·0