http://jfly.iam.u-tokyo.ac.jp/color/#pdf
http://www.cookbook-r.com/Graphs/Colors_(ggplot2)/#a-colorblind-friendly-palette
绘制图形如何选择美观和友好的颜色模板？
参考上文，绘图时既要兼顾色盲和非色盲者，又能通过不同的颜色清晰地表现图形
image.png
针对色盲优化的色彩模板 A colorblind-friendly palette
Grey
Black
# The palette with grey:
cbPalette <- c("#999999", "#E69F00", "#56B4E9", "#009E73", "#F0E442", "#0072B2", "#D55E00", "#CC79A7")
# The palette with black:
cbbPalette <- c("#000000", "#E69F00", "#56B4E9", "#009E73", "#F0E442", "#0072B2", "#D55E00", "#CC79A7")
# To use for fills, add
scale_fill_manual(values=cbPalette)
# To use for line and point colors, add
scale_colour_manual(values=cbPalette)
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