Home › Authors › Dan Margulis 👤 Dan Margulis 4 books Books by Dan Margulis On the Law of Simultaneous Con On the Law of Simultaneous Contrast of Colors 2020 Modern Photoshop Color Workflow The Quartertone Quandary, the PPW, and Other Ideas for Speedy Image Enhancement 2013 Photoshop LAB Color 2005 Lab Color Management in Photos Lab Color Management in Photoshop 2001