he seems to know black and white, and possibly pink, but he is wrong with all other colours most of the time. we try to make it relevant for him, like saying ooh, that's red - like your blanket/our car - whatever, but it doesn't seem to be sticking. he's no genius, but he's not dim either, he got shapes from a young age, and understands the concept of numbers and letters, though he doesn't identify individual ones yet (though I wouldn't expect that tbh). He is starting to draw now, but won't identify colours in his scribbles or when selecting pens.
I've tried to adopt a very relaxed attitude, he is very resistant to be 'tested' in anyway. if anyone asks him 'what colour is this' he generally doesn't answer.
he's obvious still very young, 3.2, but it is starting to become an issue e.g. other people expect him to know his colours and there are activities at swimming e.g. fetch the blue cups, which he can't participate in.
What can i do to help him?