Back when TUAW posted a review of Paper by FiftyThree for iPad (free, with in-app purchases for brushes and other features), one of the complaints I had was that the app worked with a limited palette of nine colors and didn't provide a way for artists to mix their own virtual paints. Well, a new upgrade to Paper available today provides a color mixing capability and other new features as well.
The new features in version 1.2.1 of Paper by FiftyThree include the Mixer, a way to create your own custom palettes. The Mixer, like many features available in the app, is an in-app purchase (US$1.99) and it uses a virtual "paint pot" to blend colors.
If you're not thrilled about mixing your own colors, there are three new palettes included with the app. One of the other great features of the new version is the addition of support for Ten One Design's Pogo Connect pressure-sensitive stylus ($79.95), which TUAW reviewed a few weeks ago. Pressure input works quite well when drawing, sketching or even painting with Paper by FiftyThree.
The upgrade, like the app, is available for free on the App Store.