gpick is a color picker with palette creation and modification tools.
Editor: gpick is a color picker with palette creation and modification tools. It is written in C++ and uses GTK+ toolkit for user interface.

Features:
Fast color picking
Magnified screen area
Magnification from 2 to 10 times
Colors automatically named
Closest color name is found using CIE94 color difference function, which is closer to the way humans interpret color differences, than difference of red, green and blue color amounts
Export to following formats
Inkscape/GIMP Palette (*.gpl)
Adobe Swatch Exchange (*.ase)
Alias/WaveFront Material (*.mtl)
Import from following formats:
Inkscape/Gimp Palette (*.gpl)
Adobe Swatch Exchange (*.ase)
Picked colors can be copied to clipboard in multiple formats
Hexadecimal notation - #rrggbb
Functional RGB notation - rgb(red, green, blue)
Functional HSL notation - hsl(Hue, saturation, lightness)
Custom conversions can be done, but requires some Lua language knowledge
Oversampling with five falloff types
Multiple pixel values are averaged to help picking colors from sources with noise, patterns and etc, where each pixel is different and overall color is produced by different amounts of particular color
Mix two or more colors using variable number of steps and different mixing types
Create lightness and/or saturation variations
Create harmonious colors
Create color schemes you can free download gpick for Windows 0.1.92 now.