Color Editor - Shade Colors
Shade colors are not edited using one of the four normal color models, but using a display showing all the shades available from the chosen parent color. Drag the marker to set the new shade. The parent color is marked in the display as a small cross (shown above in the top-left corner). When the parent color is altered, the change is reflected in all shades created using it.
The two fields shown at the bottom of the Color Editor when editing a shade color allow you to set the exact position of the shade. When the shade is no different from its parent, the values shown are 0.0 and 0.0. Moving the shade to the left or bottom edges of the editing area moves one of the values towards -100% and moving the shade to the top or right edges gives 100%. The first field controls the X (relative saturation) direction, while the other controls the Y (relative lightness/darkness) direction.
Note
A color model can be selected, but this changes only the display of the color components.