Earlier we mentioned that we're working to make our IDE more friendly for people with color blindness. In the latest IntelliJ IDEA 15 EAP build, we've  changed the appearance settings, so now when enabling the Adjust for color deficiency option you have to choose the form of color blindness: To ensure that our adjustments work well, we'd like to ask you to share your feedback with us. Currently, we support only the red-green color deficiency. If this is what you have, you'll greatly help us if by downloading the latest IntelliJ IDEA 15 EAP build, enabling the corresponding option