Colorblind users may encounter graphical issues when trying to distinguish between periods of light sleep(green) and awake(orange) on the sleep lab graphs. Such users should head over to the settings tab and locate the switch for color blind mode under the options header. Enabling color blind mode switches around the colors used for the sleep graphs.
Android:Unfortunately, the android version of Sleep Time does not yet have an option for colorblind users. We are working hard to have this feature installed by a future update, so please stay tuned!