Open Source C++ Color Pickers

TranslucentTB is a utility that makes the taskbar on Windows 10 translucent/transparent. It is very lightweight, utilizing just a few MB of RAM and almost no CPU power. TranslucentTB gives your Windows desktop a cleaner, more visually appealing look and feel, and comes with a great range of features. This includes: an advanced color picker with a live preview feature for changing the taskbar color; different taskbar states that can be color-customized; and dynamic modes which change the appearance of the taskbar depending on what is being opened on your PC.

ColorCoder is a plugin for the Code::Blocks IDE. It aims to be an extended and configurable color picker, that lets you to insert the formatted color string to the current opened file in the editor.

Color selecting made easy! The ColorPicker is a tool which allows you to effortlessly select the colors of your website or for any other application.

Haydar Color Cop is a multi-purpose color picker for web designers and programmers. It features an eyedropper, magnifier, variable magnification levels

Color Picker Tool - is a free software for graphic designers, webmasters and home users. It allows you to retrieve the color of any pixel on your screen.

Coolpicker is a colorpicker plugin for 3dsmax with an advanced UI for color mixing.