I want to cover gray but I'm chemically allergic. Do you know chaper ways to color at salon?

I have dark hair. I do highlight and lowlight my hair at hair salon so that the chemical doesn't touch my skull, but it is very expensive to do so. It costs me about $140. I do this every 3 months. But after 3 months, usually my gray is visible and highlight and lowlight fade. Are there better ways to cover my gray without hurting my skin and chaper? I don't want to color my hair at home.

I want to cover gray but I'm chemically allergic. Do you know chaper ways to color at salon?

do not use HENNA as was suggested! it is not to be used on grey hair ever! also it is metalic and you would be allergic to it as you are other chemicals

I want to cover gray but I'm chemically allergic. Do you know chaper ways to color at salon?

henna

I want to cover gray but I'm chemically allergic. Do you know chaper ways to color at salon?

USE HENNA! it's all natural. go to an asian salon.