Make Black Swatch really Black in RGB mode
An old annoyance: in many occasions, in RGB Document mode the Default Black Swatch is not black, but 15,15,15 gray.
This problem shows up in every new version.
Please make sure that when a document is in RGB mode, the Black and White swatches are 0,0,0 and 255,255,255 - just as we may expect.
Egor Chistyakov commented
It could be related to color profile you are using. Please check it in Edit > Color Settings.
The problem also occurs when you create CMYK document and then change color mode to RGB—swatches stay CMYK then, and that gives this pale black.