Summary

Card Color will not function on Board if Kanban board sub-filter value are invalid and sub-filter will still show even though the value doesn't exists:

Steps to replicate

1. Create new Kanban board
2. Configure Card color
3. Enter Kanban board sub-filter with invalid value

Expected Result

Color are visible on Kanban board's cards

Actual Result

No color are visible on cards

Workaround

Enter Kanban board sub-filter with a valid value