Can you still be in the royal air force if your color blind?

No... My brother was kicked out of the Air Force because he was blind to hue's (shades) of red and purple.

I'm in the air force, and I have pretty severe color blindness. You cannot be a pilot, but there are still options available to you if you are interested in the air force. I work in the Logistics Readiness Squadron, mostly dealing with supply and vehicle operations. There are various medical-based jobs and administrative careers you may look into, as well. While not every job is on the front lines or in the sky, every job contributes to the mission, and every good airman is a vital air force asset.