Before I answer the questions, let's go back to that extension 'E' gene we were talking about with the harlequin. Think of having a paintbrush of dark color (could be black, chocolate, blue or lilac). The extension gene determines how much of the hairshaft gets painted dark, and where. Agouti (like chestnut/castor, lynx, opal and chocolate agouti as well as red, fawn, orange, cream) has bands of color on the hairshaft, typically dark, then yellowish, then dark again (although some colors have a white undercolor, and non-extension pushes the middle yellow band clear out to the tips, pushing off the dark color.)
There are five options on this gene. The most dominant is one that is apparently (scientists still aren't sure) found in just a few breeds, so I'll just quickly explain and move on. Dominant black looks like a self-colored black rabbit, because this option takes painting on the dark color to the extreme. It just plain paints the entire hairshaft dark. Next down is STEEL. This is where the dark undercolor gets pushed way, way up the hairshaft, leaving the (normally) middle yellow band hanging clear out on the tips of the fiber. It's why they are gold-tipped steels, it's all that remains of the middle band, the rest of the banding just got pushed entirely off the hairshaft.
But some steels are silver-tipped, why? It's because of the action of another gene, the 'C' color gene. It also has five options, in descending order of dominance: Normal full-color (like black or chestnut), chinchilla (which keeps any dark color but turns off the yellow pigment factories, leaving all the yellow bands as pearl white), sable (which also turns off the yellow pigment but also reduces the nice dark blacks to sepia brown), Himalayan pointed whites (also called Californian) where there's no yellow pigment, and the dark pigment is only on the points (ears, face, legs, tail) while the rest of the body is pure white with pink/red eyes, and finally the albino red (or ruby) eyed white (REW) where all the pigment factories have been shut down, and couldn't paint on the colors that the other genes called for. Chinchilla and sable bunnies have their middle agouti bands turned from yellow to pearl white, so when steel pushes that band to the tips--it comes out as pearl white--which they call silver-tipped steel. When you see a silver-tip, you know that you have chinchilla or sable genetics as well.
However, when I looked closely at your rabbit, it looks like some of that tipping might not be just ticking. I couldn't tell--when you part the hair, is the ticking just on the very tips of the hair, or are there white hairs going down to the skin (which would be silvering, an entirely different gene not related to these others)?
As to the doe. Typically, sable, which has the black coloration watered down to sepia brown, has a darker color over the saddle of the back, and then fades (or shades) down lighter as you get lower on the body. This rabbit does not appear to do that, it appears quite light cream on the saddle as well. You said there was red in the background--red is the 'ee' non-extension gene that causes tortoiseshell in self-colored rabbits or orange/fawn in agouti rabbits, plus some modifiers that make the color more reddish. In red torts, only the red tones print on the body hair, while the dark colors remain only on the points. This rabbit has dark points, so it isn't an agouti, it's a non-agouti self-colored rabbit.
Remember what we said about chinchilla taking out the yellow/red tones, leaving those places creamy white? It looks to me like this doe is a pearl--it's what happens when non-agouti torts meet chinchilla or sable. This is a close-up of the area on the face above the doe's eye:
View attachment 39342
It looks more sepia to me than black or chocolate, so I'd call this a sable pearl.
Just to finish the extension series: Normal extension, where whatever dark colors the other genes call for are in their proper places, is next down after steel, dominant over both harlequin and non-extension (the orange/red/fawn/cream shades) that we've already talked about earlier.