Using red and black in visualization – Medium
▻https://medium.com/@LiangGou/using-red-and-black-in-visualization-559da3eeacae
Some simple observations from above example of applying red/black in data visualization: (1) Strong emotional expression: the sharp contrast of two colors shows a strong emotion in the first two examples of people died in wars. It is engaging and intrigues a reader’s strong empathy; (2) Simple message to convey: the above visualization only conveys simple message not complicated ones.