As someone who needs to use every color in the pack of highlighters to do any assignment, believe me when I say that this is the definitive ranking of all the colors from worst to best.
It's too dark to see what you're highlighting, so if this is your top choice, I don't trust you.
Sometimes blue is nice, but sometimes it's way too dark. A dying blue highlighter is an acceptable choice, but a brand new one? No.
The pink is always way too bright and hurts my eyes.
Green is a nice middle-ground where it's not too dark, not too light; not too bright, not too dull.
Yellow is the classic for a reason, but it's a little too basic sometimes.
I will die on this hill. Orange is the perfect highlighter, and I will tolerate no slander. It is the perfect brightness and the perfect shade. Don't even try to change my mind.