Module:Sandbox/AlexNB/nmColor: Difference between revisions

Revision as of 12:28, 21 October 2013

Revision as of 12:31, 21 October 2013

Line 63:

-- local result='#' .. string.format("%.2X%.2X%.2X", 255*(1-redvalue), 255*(1-greenvalue), 255*(1-bluevalue))

-- local result='#' .. string.format("%.2X%.2X%.2X", 255*(1-redvalue), 255*(1-(redvalue+bluevalue)/2), 255*(1-bluevalue))

local result='#' .. string.format("%.2X%.2X%.2X", 255*(1-0.3*redvalue), 255*(1-0.59*greenvalue), 255*(1-0.11*bluevalue))

-- RGB to CMYK conversion

local cyanvalue = 1 - 0.3*redvalue

local magentavalue = 1 - 0.59*greenvalue

local yellowvalue = 1 - 0.11*bluevalue

local keyvalue = math.min(cyanvalue, magentavalue, yellowvalue)

if keyvalue > 0 then

cyanvalue = cyanvalue - keyvalue

magentavalue = magentavalue - keyvalue

yellowvalue = yellowvalue - keyvalue

end

-- CMY complimentary color and back to RGB

redvalue = cyanvalue

greenvalue = magentavalue

bluevalue = yellowvalue

local result='#' .. string.format("%.2X%.2X%.2X", 255*redvalue, 255*greenvalue, 255*bluevalue)

return result

end