With what kind of flame does pure oxygen burn?

Question

with what kind of flame does pure oxygen burn?

Answer 1

In combustion oxygen is an oxidizing agent. The flame color depends on the reducing part. So carbons have a yellow/orange flame color while metals can have other colors as well.(eg. green,  when chromium is reduced).

So pure oygen alone doesn't burn with a special  flame color.

Answer 2

oxygen helps in burning but itself does not burn.

Answer 3

No flame. Oxygen is a non flammable gas. It supports the combustion of other gases, but by itself it does not burn.