Pygal Legend colors do not map customized color set

Hi,

We are using Pygal 2.2.1 with Python 2.7

I successfully tried the following sample (custom style based on 5 colors) :
http://www.pygal.org/en/stable/documentation/custom_styles.html

When adding a sixth data entry, the color on the graph is a new sixth color derived from the first one: fine !
To do that, I simply add a new data line:
chart.add('F', [9, 4, 2, 1, 2, 10, 5])

However, the color of the legend is not that one; it seems the colors on the legend uses a repeating series of the 5 originals ones ...

Do I miss something ? Or is this a well known bug ?

Regards,

Bernard

Start with the custom styles example in the Pygal documentation and reproduce the issue using Pygal 2.2.1 with a five-color style and the added sixth data line. Trace how graph colors and legend colors are selected; done means the sixth legend entry uses the same derived color as the sixth graph entry.

Written by the indexing model from the issue text.