Could you tell me what are some careers that you can not pursue if you are color blind?

Depends: The most common type of "color blindness" is red-green color deficiency. Blue-yellow deficiency or true color blindness (achromatopsia) are rare. Color testing can identify which. The problem is a lack of certain types of cones or their opsins (light-sensitive compounds). Red-green deficiency can be adapted to fairly easily and is not very limiting, but the others can significantly impact vision.

Where color matters: Many people have colorblindness, but unfortunately, people (our country) have not emphasized developing or promoting solutions to make daily life color-vision neutral. One cannot be a commercial pilot (and probably not a military pilot) because colorblind pilots are not allowed to fly at night. Careers using colors (graphic design, painting, cosmetics, clothing/fashion) would be difficult to do.

Very few: If you are color deficient you would have difficulty in color grading, paint matching, wardrobe advise and design, painting, printing trades, and electronic assembly work. A few trades require color normality, especially law enforcement. Otherwise most other careers are open to the color deficient.