Sky blue. Robin’s egg blue. Turquoise. Cerulean. Navy. Denim. Teal. Periwinkle. Aquamarine. Some of these Crayola crayons are fancier sounding than others and some hardly seem blue at all (looking at you Periwinkle), but in the end, they’re all blue.
As the admissions committee drafts a medical school class, it also uses an array of colors. Admissions committees believe in the value of diversity, not just the usual skin colors but also a diversity of perspectives, majors, and backgrounds. The class needs only so many “typical pre-meds” (or blue crayons),
Moral of the story: if you’re blue like everyone else, you’ll have a harder time getting selected.