One of the coolest dyes I ever saw was from across a parking lot. I saw a lady, must have been 80 years old, pushing a shopping cart, and her hair (which I'm sure was pure white originally) was this neon pink-orange sunrise color. It was so bright I could see it from across the lot, and all I could think was, "You go, girl!" She marched as if she owned the place, and I loved the vibrant color. Sure, it was obviously a dye job, but at 80 years old, I figured she could dang well dye it whatever she wanted to!
My son tried once to dye his hair midnight blue. He was 17 and I figured what the hey, it's only hair. Well, he is 1/2 Asian, and dyes don't always work the same on Asian hair, he discovered. He ended up with Kool-ade, smurf blue! Talk about weird...