GANTT: set default color for data without index value

plotly.js
1

When creating a GANTT chart, we have set the index (for coloring) to a column with categorical values. In some cases, the categorical column is empty (NaN) and the GANTT bar color is white:

GANTT with white bars on white background
Screenshot_20181005_120832.png697×214 3.7 KB

How can I configure the GANTT to use a different default color, so the bars are visible?

2

Gantt charts aren’t part of the plotly.js official API. I suspect there might be a plotly.py wrapper for them, but would you mind telling us how you created those?

3

Jep, it is a Python wrapper: