Those quotes are for consideration -- for possible wriggling
I agree the 'implication' in
The Lord of the Rings is that Círdan looked old in ways, due to the specific phrasing there -- however in a more general light I think one could 'wriggle' that
grey could refer to silver hair, described elsewhere for this character.
And I myself prefer to wriggle on this point -- even if it goes against the implication I agree exists (in Tolkien-published text to boot), because I think Tolkien's Elves would ultimately 'fade' in the body as opposed to looking aged (though I suppose if his hair went from 'silver' to 'grey' it is not really that much of a physical change in itself).