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We all know what “white” is. We can picture a white sheet of paper. We know it is white because we learned it. But if you put your paper sheet under a summer sun, or a cloudy sky, or at home with those warm living-room bulbs, that white will change color. It might disturb you for the first few seconds, then you will just forget about it: your brain will adapt.

This will apply to upstream Darktable as to Ansel since they share most of their color pipeline. The following procedure will help you troubleshoot your color issues, whether it is inconsistent appearance between export vs. preview, or between screen vs. print, or between 2 apps. Setup your desktop properly The inherent problem of color is it exists only as a perception, and that perception is highly contextual and fluid. If I take any color patch and display it over a white, middle-grey or black background, it will not appear the same even though a colorimeter would confirm it’s the exact same color.

mindmap root((COLOR)) color appearance model uniform color space chromaticity U, V a, b lightness L delta E chromatic adaptation transform illuminant color reproduction index color temperature surround lighting background lightness dimensions Munsell hue chroma value natural color system blackness saturation hue CIE lightness brightness saturation chroma colorfulness hue measure colorimetry tristimulus sensor Luther-Ives criterion metamerism dynamic range noise mosaicing Bayer XTrans zipper artifacts spaces rgb(RGB) HSV HSL LMS Yrg XYZ Yxy Yuv Ych CYM CYMK primaries cone cells LED ITU BT.