… for Apple Final Cut Pro X
Tip #601: FCP X: Color Wheel Secret
Lock the hue while varying the saturation.
Here’s a secret tip when working with the macOS Colors window to choose a color.
Drag the small puck in the color wheel to choose a color, then press the Shift key.
This constrains the movement of the puck so that it moves in a straight line between its current position and the center.
This allows you to lock the hue while changing the saturation.