quickandeasy saidTotally, I’m pretty sure that’s in all the versions of PS.. at least as far back as version 7 I think (that I can remember). But the point was just that it gives you a better visual of your color range, rather than dragging around the picker and watching to see if the alert shows up to tell you you’re out of range. Thanks for sharing though
Cmd+Shift+Y (Ctrl+Shift+Y on PC) will toggle CMYK only colors when you have the Color Picker open.
In CS6, this icon also represents when you’re outside of CMYK colours:
And after you see that little warning icon….
Just click the little swatch underneath it (The SECOND ONE BELOW IT) and it will automatically go to the correct color for CMYK.