What are Plotly's default colour scales?

Question

On this page plotly alludes to the fact they have some default colour scales, such as "Viridis". I cannot for the life of my find a web page documenting what these named colour scales are.

Answer 1

The problem was that I'm British and spell colour correctly. The colour scales can be found at https://plot.ly/ipython-notebooks/color-scales/ and in this source file for JavaScript.