I always think it easier to think about point colors this way: let's take sealpoint:
A sealpoint is genetically a black cat with an overlying "colourless" coat (the point gene). At the points (face, ears, tail, legs) the underlying colour (black, although it looks brownish on pointed cats, which justifies the special name seal) breaks through, and the temperature determines how much of this colour breaks through.
I have a sealpoint/white moggie, she is two years old now and brownish all over her body, when she was younger people used to call her white. I always had a harrd time explaining them some of the parts they called 'white' (eg her back) were not white at all. When she got older I could explain it better. She has a big white spot on her breast, so now I can point out the difference between white (spotted) and "white" (barely coloured because of the point gene).
I guess the Burmese gene (cb) is like the point gen (cs) but it isn't repressing colour as much, more of the underlying colour breaks through.