My default black (000000) is registering as a dark grey (1A1818). I have updated the software and tried CMD+drag the "black" and white style in Graphic Styles to the default location in an effort to reset. Nothing is working; every time I need black (which is often) I have to go in and manually change the color to 000000.
This was a long time ago, but did you ever figure out that your document was in CMYK color mode? Note that in your screenshot, your black is CMYK pure-black, which will not map directly to RGB/Hex pure-black.
Changing to or creating a document as RGB would prevent this from happening.