What colour does the compound dinitrogen trioxide appear in its liquid state?

What colour does the compound dinitrogen trioxide appear in its liquid state? Correct Answer Blue

Dinitrogen trioxide (N2O3) is found to be blue in colour in both its liquid and solid state. The blue colouration tends to appear because dinitrogen trioxide is a radical pair of nitric oxide and nitrogen dioxide that tend to absorb strongly in the visible region to appear bright blue.
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