Famed artist Bob Ross painted a grey scale landscape in 1984 after meeting a colorblind man who believed that he would never be able to paint to show him that he can.

著名艺术家鲍勃·罗斯在1984年画了一幅灰色调的风景画，因为他遇到了一个色盲，这个色盲认为自己永远也画不出来。