Leaping Bytes has updated Colorplex (http://www.leapingbytes.com/products/colorplex), its color calculator app for Mac OS X, to version 1.2. The US$1.99 app allows you to manipulate colors in RGB, HSB, CMYK or Gray Scale colorspace and instantly see results in the large preview area.
Colorplex provides individual controls for foreground and background. You can even replace the background with an image of your choice or use text as a foreground. For serious color gurus, Colorplex provides a handy scrap book that lets you preserve your work and share it with your colleagues and customers.
Version 1.2 can use text as a foreground and can drag the foreground around with a mouse. There’s a bigger preview image for sharing, and the app can switch between NSColor and UIColor.
Colorplex requires Mac OS X 10.6. It can be found at the Mac App Store in the Graphics & Design category.