A color generator which allows mixing with white to produce colors that are pleasing to the eye.

generate_color.js

function generateColor(mix, mixColor) {
    if (!mixColor) {
        mixColor = {
            red:   255,
            green: 255,
            blue:  255
        };
    }

    var red   = Math.floor((Math.random()*256)),
        green = Math.floor((Math.random()*256)),
        blue  = Math.floor((Math.random()*256));

    if (mix) {
        red   = Math.round((red + mixColor.red) / 2);
        green = Math.round((green + mixColor.green) / 2);
        blue  = Math.round((blue + mixColor.blue) / 2);
    }

    return {
        red:    red,
        green:  green,
        blue:   blue,
        getRGB: function () {
            return 'rgb('+this.red+','+this.green+','+this.blue+')';
        }
    };
}