Oscar Dresses over the years

The wonderful infographic above shows the Oscar dresses worn by “Best Actress” winners from 1929 onwards (click to zoom). This infographic, by Mediarun Digital, has made its way across the Internet.

My graph below (again, click to zoom) extracts the major colour of each of those dresses, on a plot with saturation as the vertical axis. A general trend to brighter colours is noticeable, against a backdrop of black, grey, and white.