You*
It could be any temperature. Taking a wild stab in the dark at what it 'could' be is a pointless exercise.
My advice, Or at least what I would do personally, would be to buy two bulbs of the same temperature.
That way I know they will match, instead of guessing and buying bulbs that are different in the vain attempt to match the two.
I'd probably order two 4300k bulbs, as that is what are they are from factory.
Not too white, not too blue. Good beam pattern. Not overly bright or discoulored.