The brown one looks almost black (in rat colors anyway). But when I first started out with rats in 2002 I just called it brown as well. And grey is now called 'dove'. They have some many different color names these days. Like a 5% different shade already gets a new name 😮. I am getting two new male rittens from a breeder this Saturday, to add to my two (fixed) females when they are big enough to push back in a scuffle. Their colors are black silvermane (silken) and mink. Photos of them will follow next week 🙂 My girls are almost 2.5 years old (already pretty old for a rat these days) and just over 2 years old. Photos of all my rats going back to 2002 are on my profile. If you are interested in color names, look at the nfrs.org website. HTH.