This is part 1 of a series on “Which color scale to use when visualizing data” (Part 2 / Part 3 / Part 4). If you already have a good understanding of color scales, skip to the end of this article, “It’s not as clear-cut as it seems”. When visualizing data, you’re almost always working with color – e.g., with different hues (red, yellow, blue) for categories or color gradients (light blue, medium
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