Jumpiness in the lower right of Saturation component
As you drag around in the Saturation component, there is a loss of precision in the lower right corner and the pointer becomes jumping around. This is a GIF showing this behavior on the project page's Sketch example, but it is true in any color picker where the Saturation component is also used (e.g. Chrome, Photoshop).

![sep-01-2016 11-13-59](https://cloud.githubusercontent.com/assets/2553268/18172955/aa96f2ca-7035-11e6-9470-39ccb7189e74.gif)
