103 Squashed cocktail umbrella - pastel, wet pva, pencil and graphite stick

I was talking to a potter today about colour, hello Patrick! And I got caught by this idea of pink being special because of its name. What is it? It is pale red, it's red with white in it. What do we call blue with white in? Pale blue. and yellow, pale yellow. So, why did pink get its own name and not just pale red.