ZDC-101 for FCPX includes:
Z Gamma is the no frills approach for simple color adjustments in RGB space. The sliders are nuanced for nudging the color in a certain direction. Its great for when when you just want things 'a bit warmer' or 'give it a little lift'.
What makes Z Gain special is that it lets you adjust color gain parameters in both RGB and YUV colorspace simultaneously! You also have access to master gain, color gain (saturation) and Hue Shift (in degrees).
Z Color Mix
Brilliant in its simplicity, designed for the creative colorist, ZDC-101 leverages the Apple Color palette as an interface. This means you can choose the interface you want... RGB, HSL, CMYK, Greyscale, Swatches and even custom interfaces! That big color wheel gives you the finesse you crave. Global Eyedropper, yes. Saved Swatches, of course! There is no need to re-learn anything here, you are already completely familiar with this interface.