Luminosity converter
Enter a colour in hex format and this will produce the grey colour with the same luminosity.
Preview: Colour: Grey:
Hex code of grey:
Enter a colour in hex format and this will produce the grey colour with the same luminosity.
Preview: Colour: Grey:
Hex code of grey:
Taken from http://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef
if RsRGB <= 0.03928 then R = RsRGB/12.92 else R = ((RsRGB+0.055)/1.055) ^ 2.4 if GsRGB <= 0.03928 then G = GsRGB/12.92 else G = ((GsRGB+0.055)/1.055) ^ 2.4 if BsRGB <= 0.03928 then B = BsRGB/12.92 else B = ((BsRGB+0.055)/1.055) ^ 2.4 L = 0.2126 * R + 0.7152 * G + 0.0722 * B