Microsoft published a post in the Feedback Hub today acknowledging that there is an issue with the Windows Camera app that causes images to come out dark or slightly blue. The affected version is 2016.1130.1, and this should only apply to Windows Insiders.
The company says that it should only apply to certain devices - although specific devices were not noted - but luckily, there's a workaround. All you'll have to do is switch your camera to manual mode, by tapping the arrow on the top of the screen. If you see a bunch of extra controls for focus, white balance, ISO, brightness, and shutter speed, you're in the right place. Don't worry though; unless you change those controls, the camera will still work as normal.
Microsoft says that it has already fixed the issue, but the update will be coming to Insiders soon. This isn't the only app problem that Insiders are having. The Skype Preview application is crashing for many Insiders, but a fix is already available in the Fast ring.