This document appears to be a presentation by Jakob Nikolas Kather from 2015 about color in data visualization and imaging. It discusses RGB and LAB color spaces, criteria for good colormaps including traversing a long path and having linear lightness, examples of different colormaps, and an example of using color in an fMRI brain scan image. The presentation provides information on color coding, RGB and LAB color models, guidelines for effective colormaps, examples of colormaps meeting those guidelines, and a demonstration of using color in a neuroscience image.