Something I found interesting related to monochromatic interfaces was an article posted several weeks back to HN about people using grayscale to help focus. Most systems, especially, support a grayscale view for accessibility reasons (on recent versions of Windows 10 it's the default for the Win+Ctrl+C keyboard shortcut which is also why it is going around as one of the annoy a coworker pranks). I've started toying with grayscale periods on my work machine as a focus tool.