For subtle changes:
* Toner: Toners are semi-permanent dyes that deposit color without lifting your natural pigment. They can help enhance your natural color, add shine, or neutralize brassiness.
* Henna: Henna is a natural dye derived from a plant. It can add reddish-brown tones and can even help strengthen hair. Be aware that henna can be tricky to remove and can react with other hair dyes.
* Color depositing conditioners: These conditioners contain pigments that can add a hint of color over time, but won't drastically change your hair color.
For darker shades:
* Darkening dyes: You can use permanent dyes that are darker than your natural hair color without bleaching.
* Temporary hair dyes: These dyes are readily available in many shades and are a good option for trying out a new color without commitment.
Things to keep in mind:
* Your natural hair color: The darker your natural hair, the easier it is to dye it without bleach.
* The desired color: If you want to go very light, bleaching is likely required.
* Hair health: If your hair is already damaged, bleaching can further weaken it.
If you're unsure about how to dye your hair without bleach, it's always best to consult with a professional hairstylist. They can help you determine the best course of action for your hair type and desired result.