When we think of colors, most of us will probably think of red, green, or blue, but do we ever think of color spaces? If the answer is no, then think again; you've just mentioned one of several color spaces we can use.

Color spaces are a means of uniquely specifying color. The most well-known one is red, green, and blue (RGB). However, others are available, such as Hue, Saturation, Lightness (HSL), its cousin, which includes alpha support (HSLa) or HSV (Hue, Saturation, and Value). Less includes support for these and others; we will look at these in more detail shortly, but first, let's take a look at using basic mathematical operators to create new colors.