We have blue courtesy lights on our lagoon 450. They cast a warm blue light in the cockpit, the walkways to and from the flybridge and the sugar scoops. They are attractive and are a safety feature when we sail at night.
There are 15 of them on our boat. Our boat is only 5 years old and already 5 of the lights are burned out.
We found the original lights sold by Quick here. At $44USD each, they are STUPID expensive. Without access to the back of the lights you have to destroy them to remove them.