legend and yaxis titles don't match in color

A community member has pointed out via message to Jiny that the yaxis2 and yaxis3 title colors don't match the yaxis2 and yaxis3 legend color in this example.

The community member suggested the following:

the colors follow the ‘Plotly’ color sequence (#636EFA, #EF553B, #00CC96, #AB63FA).
Setting titlefont and tickfont to those values in the order of the axes works.

A similar issue can be found in the first example in the javascript docs; the second example of the javascript docs has a yaxis5 title which does not exist in the legend.