You can either color your candles or not. Some people like them not colored and some do. I guess that part is up to you. What are you using to color your candles? Dye chips, powder, liquid dyes? I use liquid dyes in mine and to get really rich colors, well sometimes you have to put more dye in. You can also add a little black to get a really dark color. Away for you to test what the colors will be is. Take an egg carton an put some wax into it. Let it cool and that will show you what it will look like before you pour all the container, votives or whatever. I also recommend don't add fragrance oil and then dye. It least if it is the wrong color you could use it for something else.