Hate to be that guy, unless I'm at Monsters Inc, but "rose gold" does not exist as a color. Rose is a pale red, what some call pink. Gold is a slightly orange yellow with a metallic (or sequinny) sheen.
Now, there is a gold colored ears and bow.
And, there is a rose colored ears and bow which is unfortunately is called "rose gold".
But unless you take a rose bow and put it on gold ears, or a gold bow on rose ears; then there is no such things a rose gold. It's a marketing scam to sell pink sequin Minnie ears.
See here for actual gold v. rose colors...
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If you want pink sequin ears, go for it. But don't get caught in the hype of a non-existent color.