You can really add as much or as little color as you like. The same goes for glitter. So it’s really down to preference and the color depth you want. It may take some time to get this down to perfection.  Try adding a quarter of a teaspoon of color powder until you get the shade you want. Follow the pack's instructions if you’re using store-bought lip gloss color.  As for glitter, unless it’s a holiday/Christmas and time to party, my advice is a little bit goes a long way!