You could say "el dorado," which could be translated as "the golden." Technically, "dorado" refers to the color of gold, so it could also mean "the gilded" or "the gold-colored," but I think it's the phrase you're looking for.
we can say the golden one in spanish "la de oro"
In Spanish, "the golden one" translates to "el dorado." This phrase uses the definite article "el" and the adjective "dorado," derived from the verb "dorar," which means "to gild." For feminine subjects, the translation would be "la dorada."
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