RGB to XYZ and LAB colours conversion

Question

I\'m having problems converting colours from RGB to LAB space It should be straight forward using the formulas from here, only I\'m getting back the wrong values

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Answer 1

function xyzc(c){return ((c/255)>0.04045)?Math.pow((((c/255)+0.055)/1.055),2.4)*100:(c/255)/12.92*100;}

This line will convert a rgb channel to XYZ