Selecting #000000 appears to take 3 attempts

Using chrome (32.0.1700.41) and http://automattic.github.io/Iris/, when I try to select black (`#000`) by clicking in the iris square and dragging to the bottom left i'm given the color (`#0f0f0f`). Releasing the mouse and trying again gives me color (`#070707`). Finally, after trying a third time I'm given the right color.

Open the Iris demo at http://automattic.github.io/Iris/ and reproduce the issue in Chrome using the reported steps: drag to the bottom-left of the iris square while selecting #000. Trace the color-selection behavior from the relevant JavaScript entry point, then verify that the first attempt produces #000 rather than intermediate values such as #0f0f0f or #070707.

Written by the indexing model from the issue text.