Ash blonde and Platinum blonde

Platinum blonde and ash blonde are semantically related In some cases you can replace phrase "Platinum blonde" with "Ash blonde", this phrases are similar.

Platinum blonde noun - A blond whose hair is a pale silvery (often artificially colored) blond.

Ash blonde and platinum blonde are semantically related in very light-colored hair topic. You can use "Ash blonde" instead a noun phrase "Platinum blonde".