Yes, you can color your hair two days in a row as long as you use a color that is two shades lighter or darker than your natural color. If you are using boxed hair color, follow the instructions on the box.
If you are using a hair color that is not boxed, use the instructions that came with the hair color. If you are using a hair color that is not boxed and you are unsure of how to use it, ask a professional hairstylist for help.
What happens if you dye your hair 2 days in a row?
If you dye your hair two days in a row, you will most likely experience some level of damage. The hair’s cuticles will be raised and the cortex will be porous, which will cause the hair to become dry and brittle. The color will also fade more quickly. You should wait at least five days before you dye your hair again.
Conclusion
Even though the short answer is yes, you can color your hair two days in a row.
However, it’s important to note that doing so will likely damage your hair, so you should only do it if you’re willing to accept the potential damage.