Clean makeup brands are those that prioritize using non-toxic and organic ingredients in their products. They are free from harmful chemicals, artificial fragrances, and synthetic dyes, and are gentle on the skin. Here are some of the best clean makeup brands according to various sources:

1. ILIA: This brand is dedicated to sustainability and ethics and makes formulas from scratch to ensure that their makeup is the cleanest it can be. They use natural, effective ingredients with nourishing vitamins and oils in their products.

2. Beautycounter: This brand is known for its strict safety standards and transparency. They use a "Never List" of over 1,800 harmful or questionable ingredients that they will never use in their products.

3. RMS Beauty: This brand uses raw, food-grade, and organic ingredients in their products. They are also committed to sustainability and ethical practices.

4. Kosas: This brand uses botanical ingredients and is free from parabens, phthalates, and sulfates. They also use eco-friendly packaging.

5. Westman Atelier: This brand uses clean, plant-based ingredients and is free from parabens, sulfates, and phthalates. They also use sustainable packaging.

6. Jones Road: This brand was created by makeup pioneer Bobbi Brown and focuses on easy, multi-purpose products that are both clean and high-performance.

7. Exa Beauty: This brand is vegan and cruelty-free and uses clean, non-toxic ingredients in their products. They also offer a wide range of shades to suit all skin tones.

8. Tower 28: This brand is free from common allergens and irritants and uses natural, non-toxic ingredients in their products. They also use sustainable packaging.

9. Crunchi: This brand is vegan and cruelty-free and uses organic, non-toxic ingredients in their products. They also use eco-friendly packaging.

10. INIKA Organic: This brand is certified organic and uses natural, non-toxic ingredients in their products. They are also vegan and cruelty-free.

11. Alima Pure: This brand uses natural, non-toxic ingredients in their products and is free from parabens, sulfates, and phthalates. They also use eco-friendly packaging.

12. Au Naturale: This brand is vegan and cruelty-free and uses natural, non-toxic ingredients in their products. They also use sustainable packaging.

13. Ere Perez: This brand uses natural, non-toxic ingredients in their products and is free from parabens, sulfates, and phthalates. They also use eco-friendly packaging.

14. Axiology: This brand is vegan and cruelty-free and uses natural, non-toxic ingredients in their products. They also use sustainable packaging.

Its important to note that different sources may have different opinions on what constitutes a "clean" makeup brand, and that some brands may use certain ingredients that others consider to be harmful. Its always a good idea to read ingredient labels and do your own research to determine what works best for you and your skin.