Can you please tell me what kind of bands you're making, what materials you're using, and what specific colors you're trying to achieve? With more information, I can provide more specific and helpful instructions.
In the meantime, here are a few general tips for making natural-colored bands:
Use natural materials like wool, hemp, or cotton.
Dye the materials with natural dyes like plants, berries, or minerals.
Use different shades of the same color to create a more natural look.
Blend different colors together to create a more subtle effect.
I hope this helps!