Yup, blue is the color on your rabbits. It would be very helpful to read a little about color genetics, if only to learn about the different color varieties in rabbits. Blue is the dilute of black, I believe.
Then you have different patterns; solid, broken, Charlie. There are variations in these, too (such as “booted”, which is a really heavily-marked broken with white on – you guessed it – its feet), but solid is a solidly-colored rabbit, broken is a rabbit with white but plenty of colored patches, and Charlie is white with 10% or less color.
So you can have solid blues, broken blues, and Charlie blues. You seem to have a solid (just referred to as blue) and a Charlie blue.
You could read article upon article about colors and patterns and still learn more, but that’s kind of a basic run-down. I do highly recommend posing up some of your rabbits so SableSteel can evaluate them for you, though, and taking them to a show if possible.
opcorn: