a chart that starts in 1903 with only 8 crayon colors (black, brown, orange, yellow, green, blue, purple red) that shows the number of colors doubling (the colors themselves subdivide on the chart at each year marker) in 1935 and again in 1945m 1958m 1972m 1990, 1998, and 2010 until there are hundreds of colors
https://media.mas.to/masto-public/media_attachments/files/109/525/476/186/275/286/original/00379873708bce1c.jpg