Switched to an orange and green scheme.
Converted pause and resume buttons into a toggle button.
Fixed bug with lightness not actually being set on the LAB color.
Added key bindings for all of the buttons and instructions for that.
Updated explanation.
Updated color interpolation to use two easing functions for each half of the range to get a color distribution that is easier to read that linear interpolation from min to max.
Reworded liquid 'depth' as 'concentration'.