Colorplex is a Mac OS X application exclusively available on the Apple App Store.
Colorplex is a color calculator with a scalable interface that can easily transform from simple to advanced, in accordance with your needs. Colorplex allows you to manipulate colors in RGB, HSB, CMYK or Gray Scale colorspace and instantly see results in the large preview area. Unlike other color calculators, Colorplex provides individual controls for foreground and background, which makes the task of color matching much easier. You can even replace the background with an image of your choice. For serious color gurus, Colorplex provides a handy scrap book that lets you preserve your work and share it with your colleagues and customers.
What's New in Version 1.2: