if the way people respond to me whenever I say that is any indication, yes. SILVER AND GOLD, MOONLIGHT AND SUNSHINE, that feels like intentional color theming. Hell, Sentai uses that combo all the time!
I don't know why people look at Moonlight and go "silver outfit... silver in her speech... framed as an opposite to a gold/yellow cure... but her hair's purple so I'll just call her purple."
Rhythm colour discourse is one thing, Toei themselves introduced her in marketing materials as pink ("two pink Precure! Girls' favourite colour is on full display!") but later treated her as white.