Awesome! thanks… will add immediately to my UX design toolbox…
Svasti Astu, Be Well
Brahmanathaswami
www.himalayanacademy.com
On 10/6/16, 9:21 AM, "use-livecode on behalf of J. Landman Gay"
<use-livecode-boun...@lists.runrev.com on behalf of jac...@hyperactivesw.com>
wrote:
Does this work well enough?:
function luminanceRatio c1,c2 -- pass two RGB triplets
put calcLuminance(c1) into tL1
put calcLuminance(c2) into tL2
return max(tL1,tL2) / min(tL1,tL2)
end luminanceRatio
function calcLuminance pRGB
-- wikipedia: Y = 0.2126 R + 0.7152 G + 0.0722 B
put item 1 of pRGB * 0.2126 into tR
put item 2 of pRGB * 0.7152 into tG
put item 3 of pRGB * 0.0722 into tB
return sum(tR,tG,tB)
# if sum(tR,tG,tB) > 125 then return "black"
# else return "white"
end calcLuminance
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