What are the next darkest standard colors after black?

I have an opportunity to transition an extra black drum into another color but I would like to keep it dark (mainly printing text and line drawings). Unfortunately I do not have access to a color chart in person. I've been trying to google for color charts but I'm not really sure which ones look accurate enough on screens... I've only seen black, fluoro pink, yellow, and a blue in person at my local art space that has a riso (not 100% sure which shade of blue it was- I should probably email them to ask!)

Looking forward to hearing opinions and if possible photos of the color printed next to black. Also I've never transitioned drum colors before so any tips would also be super appreciated!!