Why is Photoshop changing my CMYK numbers?

I have my image mode set to CMYK. But as soon as I enter 0 C, 0 M, 0 Y, 50% K, it changes it 43% C, 35% M, 35% Y, 1% K. Attached is a screenshot.

How do I remedy this?

Color picker with incorrect values

Answer

You have “Only Web Colors” selected. Turn that off as its essentially irrelevant on modern computers. It’s trying to figure out how to best represent 50% K in a vastly reduced RGB palette known as Web Safe Colors.

Attribution
Source : Link , Question Author : HopDavid , Answer Author : Ryan

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