ColorCache 4

ColorCache is a professional color picker, color scheme generator and palette management tool. Use ColorCache to select screen colors, create harmonious color schemes, and to manage and share palettes and color swatches.
You can add new palettes to ColorCache as needed, and export them as Photoshop Color Swatch files (.ACO), Photoshop Color Table files (.ACT) or as XML files for transfer to other colleagues or computers. You can also distribute on-line versions of your palettes and swatches.
Colors can be acquired from anywhere on the screen (or screens, if you use a multi-monitor setup) using the ColorCache dropper tool. The dropper tool has a built-in magnifier and allows multiple colors to be captured in one session, without having to return to ColorCache each time. You don't even need to have ColorCache on-screen to use the dropper.
Each newly captured color is stored in a palette, and optionally, can be automatically copied to the Windows clipboard in a format of your choosing, ready to be pasted into other programs. If none of the supplied color formats are suitable, you can define your own.

Select a color/colors on any palette and adjust hue, saturation and lightness. You can adjust whole color schemes - for example, take an existing, pleasing color scheme and create variations in different colors.