Xcode 8: Interface builder shows different color that set

If you make an Asset Catalog, and add your colours in there, you can enter them as.

Devices: Universal Content: sRGB Input Method: 8-bit Hexadecimal

Add all your app colours in this way, and reference them by their Asset Catalog names, and all Hex Values will be preserved and displayed correctly.

Same problem in my projects, I solved this issue choosing "Device RGB" and not "Generic RGB". Some. time the color not change , move opacity and the color will set. see the image: