Fading Colours

I’ve been quite confused when fading colours. Basically I wanted a color to fade to white and have looked at this:https://maurits.tv/data/garrysmod/wiki/wiki.garrysmod.com/index0814.html and messed with the numbers and had no luck is there any way someone could explain this better or is there a better method?

I could help you if you wish. My steam is, “Red-XIII”.