Maybe I should have phrased that 'There is no such recognised colour as beige IN THE UK', which is where your breeder is located of course. Make sure you check they know what they're doing since they don't know their colours - if they are setting themselves up as very knowledgeable this is a clue that they're not. Since you might be breeding from this mouse you want to know you're getting it from the right person. Clearly it's a pet quality mouse, so be extra careful and enquire about illnesses in that line. If they can't tell you about the line past the parents then again beware. I'm not saying pet mice are terrible but I know I wouldn't breed from them myself.