I have read somewhere, that in the times of b/w television - the majority of people would have dreamt in b/w for the majority of times, and that this is now reversed. I forgot the numbers, but it was pretty astonishing - something like from 70% b/w down to 25%.
I seem to always dream in colour - if I remember a dream - it's always got colour and sometimes even something very prominent - like a woman all in garish glaring pink dress.