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Well, gaseous oxygen is colorless. However, when in liquid form, it comes in a shade of pale sky-blue. Liquid oxygen in a beaker, showing its characteristic pale-blue color.
Oxygen itself does not have a specific color in the visible spectrum. In its gaseous form, oxygen is colorless and transparent. However, when it is in its liquid or solid state under certain conditions, it can exhibit a pale blue color due to its absorption of red light. This coloration is very subtle and not readily observable under normal conditions.