Natural candle making is a wonderful craft, and keeping with the natural theme it is so much more satisfying to use natural dyes derived from nature to add colour, keeping things sustainable and eco-friendly.
Suggestion: combine with sandalwood for a browny/red colour and some natural scent.
This guide provides a background to the use of natural dyes, types of waxes, and colour chart, and suggested method and recipe to colour wax.
This guide is a downloadable pdf file.
Please note the use of natural dyes require experimentation. Natural dyes provide more subtle and softer colours than synthetic dyes and pigments.