FWIW, I'm not sure that tracks entirely, and that's accounting for my own years training in various analog and digital art media. For most US English-speaking humans (if not universally^1^, minus linguistic^2,^ ^3^ and biological^4^ differences, [per Oklab^5^]), the modern understanding of subtractive color^6^ (ie. [reflected] vs additive [light]) holds that :

• "Primary" blue == "proper" blue— it's in the name, heh. ☺️
• Navy & Royal are near neighbors, differing in both shade and saturation;
• Robins egg, sky, and electric mostly differ by shade and slightly in hue (+luminance/vibrance for electric), and
• Turquoise, ironically^7^, is nearly centered between primary blue & secondary green, while the stone is historically renowned for its incredible vibrance in its chromatic variance. (blue to yellow^8^)

It's crazy out there in color land! 🤣