The new camera command can be used to fade the screen to a specified colour. You can input 0-255 in the three RGB channels. However, if all three channels are not zero, the screen fades to white instead of whatever colour you've specified. This does not happen if only one or two channels are not zero.
For example, inputting 255, 0, 180 gives a hot pink colour. This is reflected in the screen fade. Inputting 0, 255, 0 will give you pure green. But let's say you want a sky blue and input 20, 150, 230. Instead of the blue you desire, It simply fades to white.

Steps to reproduce:
1. run /camera @s fade color <red> <green> <blue> where <red>, <green>, and <blue> are all between 1 and 255, inclusive.
2. Your screen will fade to white instead of the RGB combination you specified.

Video, as the file is well over 10MB: https://imgur.com/a/c7SDUc9