Text.addColor allows you to set specific colors within the Text. It works by taking a color value, which is a typical HTML string such as `#ff0000` or `rgb(255,0,0)` and a position. The position value is the index of the character in the Text string to start applying this color to. Once set the color remains in use until either another color or the end of the string is encountered. For example if the Text was `Photon Storm` and you did `Text.addColor('#ffff00', 6)` it would color in the word `Storm` in yellow.

Text.clearColors resets any previously set colors from `Text.addColor`.