Color Blind - Maritime Academy

My son applied to 4 of the Maritime Academies and was accepted starting in the fall. We have been deciding which one was the right fit. He had an eye test today and they determined he is colorblind.

Does this ruin his dream of getting either of his 3rd mate or 3rd engineer license? I can't seem to find the answers to this so thought I would come on here and ask the experienced. :)