https://www.shutterstock.com/zh-Hant/blog/complete-guide-color-in-design
https://www.interaction-design.org/literature/topics/color-theory
https://www.sketch.com/blog/introduction-to-color-theory/
https://pavilion.dinfos.edu/Article/Article/2305097/color-theory-basics/
https://30menu.com/zh-tw/blogs/news/color-theory
https://99designs.com/blog/tips/the-7-step-guide-to-understanding-color-theory/
https://99designs.com/blog/tips/the-7-step-guide-to-understanding-color-theory/
https://www.youtube.com/watch?v=DLLRLwhPFso