First attempt at dyeing hair:
Target: Cobalt Blue (what it says on the tin. I'd just call it "blue")
Procedure: Apply dye to head. Wait 30 minutes. Rinse with cold water until water becomes clear.
Result: A very strange, but certainly not uninteresting aqua-ish blue-green.
Conclusion: Either the brand/color was off, leading to sub-par performance, or not enough time given to allow the color to set. Other possible explanations include: 1) My hair is too light (or dark. Whatever) for this color and 2) it might show up the correct color after it dries completely. Will test further when I wake up.
Overall: I am not disappointed, as the objective of the entire process was to produce an interesting hair color. My only disappointment lies with the formula itself, which may still redeem itself.