I have dark brown hair, and coming Halloween I am planning to color my hair in green, to match it well with my costumes. The costume is actually something similar to the Joker of âBatmanâ, and I am really excited about wearing it! However, instead of wig, I want to use a green hair dye to color my hair. Nonetheless, before actually applying it, I want to know how would the green hair dye look like, once itâll start fading! Would you recommend temporary green hair dye for the party, to avoid any hassles of fading hair color, or hair damage? I would be extremely grateful to you guys for some valuable information and advice on hair color dye.