Here are 10 organic face mask ingredients that can help remove tan when combined or used individually:

1. **Yogurt and Honey Mask:** Mix yogurt and honey to create a soothing mask that can help lighten tan and moisturize your skin.

2. **Turmeric and Gram Flour Mask:** A mixture of turmeric and gram flour (besan) can help reduce tan and brighten your complexion.

3. **Aloe Vera Gel Mask:** Apply pure aloe vera gel to your face; it's known for its soothing properties and can help fade tan over time.

4. **Cucumber and Lemon Juice Mask:** Combine cucumber juice with a few drops of lemon juice to create a refreshing mask that can help lighten tan.

5. **Papaya Mask:** Papaya contains natural enzymes that can exfoliate your skin and reduce tan. Mash it up and apply as a mask.

6. **Oatmeal and Buttermilk Mask:** Mix oatmeal and buttermilk to create a gentle exfoliating mask that can help remove dead skin cells and tan.

7. **Tomato and Yogurt Mask:** Blend tomato pulp with yogurt for a mask that can lighten tan and even out your skin tone.

8. **Coconut Milk Mask:** Coconut milk is moisturizing and can help reduce tan. Apply it to your face and leave it on for a while.

9. **Sandalwood and Rosewater Mask:** Sandalwood paste mixed with rosewater is known for its skin brightening properties and can help with tan removal.

10. **Orange Peel Powder Mask:** Dried and powdered orange peel mixed with yogurt can create an effective mask to reduce tan and improve skin texture.

Remember to do a patch test before applying any new mask to your face, especially if you have sensitive skin. Also, consistency is key when it comes to treating tan; results may take time.