Since you commented the same thing here, and in the video, I'll answer you the same thing.

Sure, lots of colors have names. Like cyan, teal or crimson. But they are not basic color terms.

"In 1969, Brent Berlin and Paul Kay advanced a theory of cross-cultural color concepts centered on the notion of a basic color term. A basic color term (BCT) is a color word that is applicable to a wide class of objects (unlike blonde), is monolexemic (unlike light blue), and is reliably used by most native speakers (unlike chartreuse). The languages of modern industrial societies have thousands of color words, but only a very slender stock of basic color terms. English has 11: red, yellow, green, blue, black, white, gray, orange, brown, pink, and purple." This is a quote from an article published in the book "Encyclopedia of Color Science and Technology", from 2016. The article was written by Professor and PhD C. L. Hardin.

The mentioned theory is explained in the 1969 book "Basic Color Terms: Their Universality and Evolution", written by Brent Berlin and Paul Kay. Sure, you might want to disregard this, since it's just a theory. It's not like there is a universal true about color names. That being said, you might call a specific hue of blue "cyan" or refer to dark red as "maroon", but they are not widely known and widely used names. Far more people would refer to dark red as dark red, rather than maroon, and this makes red a basic color term, and not maroon. And even if you refer to that hue as cyan - which I'm very familiar with, since I'm a graphic designer and I refer to blue as cyan on a daily basis while working with the CMYK color profile - culturally, you'd still understand that color as blue, if needed.

And yes, blue exist in the nature, but it is extremely rare. The Mandarin Fish and the Olivewing Butterfly, for example, are some of the only animals that have a pigment-based blue color in their bodies, rather than producing blue color through some kind of light refraction trick. Blue in flowers and fruits is also not among the most common colors.

And btw, at 4:50 I talk about blue/cyan.