Why is #00FFFF called "Aqua" and not "Cyan"?

I guess there exist multiple names for the same colors, per https://www.w3schools.com/cssref/css_colors.php, and for some reason "Aqua" takes precendence in this display.

Could be just plain alphabetical. There's a selector for which color name list to use/examine on the bottom of the visualization. There's also a selector for which color space model to use.