Freezing point of water with respect to pressure.

I know when the pressure is reduced, the boiling point of water is reduced as well. But how does the pressure affect the freezing point of water ?

In a low pressure environment is the freezing point more then 0 C or less ?

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The transition between solid and liquid is the red line separating the blue (solid) and dark green (liquid) zones. It is quite clear that it is mostly constant when pressure is increased even up to $200$MPa (atmospheric pressure is more or less $0.101$MPa and also when it decreases.