We've been talking to Pob about colours for a while. Just when I think she's getting it she indicates that it's all pretty random. If she's asked what colour something is, she tends to say: "BLUE!" or alternatively "Pink-purple". If she's told no it's not, she rotates through other colours, usually 'ello', 'orange' 'een' in that order.
Last night I asked her what colour her pyjamas were. They're checked, white and red. She said 'BLUE!' and I said no they were red, and she pointed at the white bit and said, "No!" Which indicated that she had at least some clue. So I told her it was like Elmer, but with fewer colours. Elmer is checked red, purple, black white, orange, yellow, pink, green and blue, and her pyjamas are checked red and white. We left it at that.
This morning we were talking about her blocks. I asked her what colour a block was and she said 'orange!' which it was. So I asked her what colour her pyjamas were, and she said 'Elmer!'
She may be colour blind, but she makes connections....