Hair color?

I am going to color my hair but i dont know what color! I have blue green eyes (more green then blue) and flecks of gray. I was thinking like black or really darkbrown. My skin is a pale beige. I was thinking having like a clip in extension of like 5 colors and put on in each day depending on my outfit. Like red, green, blue, ect. What do you think? My natural hair is light brown and its dyed right now auburn but it is mostly faded. HELP!!