The colour scheme is:
Green = power on, dim (flashing) - will be implemented with future update, sleeping (pulsing) - will be implemented with future update
Red = booting up, shutting down, muted (flashing)
Gold = short term limiter active (flash), firmware update (slow blinking), factory reset (fast blinking)
Violet = long term limiter active (on whilst active)
White = identify function in A Control
Further features, such as an accessibility mode for colour blind customers and a brightness control, are planned but won't be in the first release of A Control.