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Color mixing: addition & Subtraction. Physics Arrowhead High School 2013 – 2014. Color Addition. Primary Transmission Colors Red, Green & Blue Pixels on a screen Colors produced on a screen depend on the intensity of each colored pixel
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Color mixing:addition & Subtraction Physics Arrowhead High School 2013 – 2014
Color Addition • Primary Transmission Colors • Red, Green & Blue • Pixels on a screen • Colors produced on a screen depend on the intensity of each colored pixel • Colors absorbed by the eye’s cones peak at Red, Green & Blue
Color Addition – White Screen Intensity R G B
Color Addition – Red Screen Intensity R G B
Color Addition – Blue Screen Intensity R G B
Color Addition – Gray Screen Intensity R G B
Color Addition – Yellow Screen Intensity R G B
Color Addition – Orange Screen Intensity R G B
Color Addition – Teal Screen Intensity R G B
Color Addition – Color Wheel Red Magenta Yellow Blue Green Cyan
Color Addition - Practice • R + 0 = Red • R + B = Magenta • R + G + B = White • B + G = Cyan • G + 0 = Green BLUE RED GREEN 1 2 3 4 5
Color Addition - Practice RED • B + 0 = Blue • B + R = Magenta • B + R + G = White • R + G = Yellow • G + 0 = Green BLUE GREEN 1 2 3 4 5
Color Subtraction • Primary Absorption Colors • Magenta, Cyan, Yellow & Black • Printer Ink Colors • These colors reflect the transmission colors that make them up and absorb the others • Intensity controlled by amount of ink used • Number of dots printed • Size of dots printed
Color Subtraction – Cyan Visible • Cyan ink is printed on white paper • White light (RGB) shines on the paper • The cyan ink absorbs red and reflects green and blue • The eye sees the color cyan
Color Subtraction – Cyan Visible Intensity Intensity R G B R G B
Color Subtraction – Using the Color Wheel • The absorption color (Cyan, Magenta or Yellow) absorbs the opposite transmission color • Black absorbs all transmission colors and darkens the resulting color
Color Subtraction – Red Visible Intensity Intensity R G B R G B Magenta absorbs green Yellow absorbs blue
Color Subtraction – Maroon Visible Intensity Intensity R G B R G B Magenta absorbs green Yellow absorbs blue Black absorbs some red
Color Subtraction – Navy Blue Visible Intensity Intensity R G B R G B Magenta absorbs green Cyan absorbs red Black absorbs some blue
Color Subtraction – Light Green Visible Intensity Intensity R G B R G B Low intensity cyan absorbs some red Low intensity yellow absorbs some blue