Windows 64 bit, GT 740M
The color circle allows values between one and zero, however if you use drag and select to increase all values at the same time, you can go beyond the max value. You can also get values less than zero.
- Pick one of all existing color circles, no matter where, take one from preferences, material editor, node editor etc.
- Set one of the RBG channels to any value and keep the other at zero
- Multi select all channels and drag to increase/decrease value. Make sure to select the lowest value channel at last.