How many colors does your kid know? Possibly colorblind?


We have been working on letters, shapes, colors and counting for months. He knows a lot of letters can count to 5, and has a great vocabulary, but when it comes to his colors which we have worked on more than anything, he rattles off colors but hardly EVER gets the color right. He will say purple, green, blue, red, brown, yellow, orange, white and black, and will repeat after us, but as much as we work on it, I would think he would be able to identify the color. I think I have some uncles that are colorblind and I hear it runs on the moms side of the genes. Any thoughts or suggestions? Any way to definitively tell? Any other kiddos having the same confusion?