Problem:

When creating a distributed line chart report and enabling the goal line. The chart legends turn into a gray color.

Steps to reproduce:

1. Create any report that has distribution and visualized as line chart.
For example,
View: Flow Node - count 
group by: start date - month
distribution: flow node
Visualization: line-chart

2. Open the visualization configuration popover.

3. Enable goal value.

Actual result :

All legends become gray
 
Expected result:
Legends stay colored when enabling the goal line