When using this particular solution to calculate the darker range of a color, I encountered an issue where the output does not seem to be the correct Hex value as it is missing one part.
> #84079
I'm wondering what mistake I might be making in my approach?
function LightenDarkenColor(col, amt) {
var usePound = false;
if (col[0] == "#") {
col = col.slice(1);
usePound = true;
}
var num = parseInt(col,16);
var r = (num >> 16) + amt;
if (r > 255) r = 255;
else if (r < 0) r = 0;
var b = ((num >> 8) & 0x00FF) + amt;
if (b > 255) b = 255;
else if (b < 0) b = 0;
var g = (num & 0x0000FF) + amt;
if (g > 255) g = 255;
else if (g < 0) g = 0;
return (usePound?"#":"") + (g | (b << 8) | (r << 16)).toString(16);
}
var firstColor = LightenDarkenColor("#3068A1", -20);
var NewColor = LightenDarkenColor(firstColor, -20);
console.log(NewColor);