Eli5 why is light red (pink) its own color but light blue and light yellow aren’t?

Question

Eli5 why is light red (pink) its own color but light blue and light yellow aren’t?

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Answer 1

What do you mean? Of course they have names. Periwinkle?

https://acrylgiessen.com/en/shades-of-yellow/
https://cssgradient.io/shades-of-blue/

Pink is actually a combination of red and violet, two colors, which, if you look at a rainbow, are on the opposite sides of the arc.