Lightest color from the color palette

[tiagogon]

Since i would like to use this scrip to get a color for a background (that i want to be light), I would like to know if there is a way to get from the color palette the lightest color?

Thank you!

[Pluto1010]

Maybe this is something for you: https://gist.github.com/Pluto1010/f26beed7fdebfb2e2110

[AlfredJKwack]

I know this is an old thread but just in case someone comes across this here's a solution.

The calculation used is Relative Luminance. There are other options though. You should also note that the function will only return one color, even if there are several in the palette which have the same luminance value.

var lightestColor = palette.reduce(function(previousValue, currentValue){
    var currLightNess = (0.2126*currentValue[0] + 0.7152*currentValue[1] + 0.0722*currentValue[2]);
    var prevLightNess = (0.2126*previousValue[0] + 0.7152*previousValue[1] + 0.0722*previousValue[2]);
    return (prevLightNess < currLightNess) ? currentValue : previousValue;
});

Assuming the below input:

var palette = [[58,40,29],[179,132,42],[110,204,222],[213,219,185],[162,184,117],[129,119,105],[43,125,148],[172,198,208],[44,68,132]];

you'll get a return value of:

lightestColor = [213, 219, 185]