[Cronus]

Guys, I appeal to you for help, I need to find a good dark gray or Black background for the forum, maybe you will advise a site on which I will find something suitable?

[Oblivious]

https://flatuicolors.com/

[mothered]

I'm not sure If this will suit your needs, but It's a color scheme generator thus allowing you to adjust the color, saturation, hue etc according to your requirement.

Link: https://coolors.co/