Eye Brow dying after Chemo hair loss

Hiya, so my mum is about to have chemotherapy and is getting extremely worried about the hair loss and obviously the lack of identity she feels go along with this. 

I’m 18 and very good at makeup and beauty so I’m happy to do eyelashes and eyebrows but I’m not sure what eyebrow dye I can use that dyes the skin not the hair? 

Be great if anyone could help me out and share how they’ve got round this? 

Lots of Love 

Jaz xxx