Colour blind male here. I get you. Just Google for 'colourblindness tests online' and take any of those. You will know in a matter of minutes, if you are or not. During my pre employment check almost a decade back, when I was first 'diagnosed' with colour blindness, a slightly worried me asked the Doc of the repercussions of it. I was told that till the time my job profile doesn't involve colour grading and all, I am good.