In order to improve the visualization flexibility offered by Swift Kanban, it should be possible to define what color a card should have based on the current value of one specific card attribute, e.g. class of service, priority, etc. The attribute should be defined for each project individually.

Background: many teams need only one card type (e.g. user story) and would like to use card colors to visualize a specific card attribute that wouldn't be clearly visible otherwise.

For example, a project using only user stories can classify each story as standard, fixed date, expedite, intangible, etc. and the project team wants to clearly visualize this attribute in order to make the right pull decisions. Another project may prefer to have different colors for different priority values, etc.

With the current implementation the admin must define different card types, even if they are not really required (e.g. a project works only with user stories but needs 4 card types to visualize their class of service). And it is more time consuming to (for example) expedite a card that was originally created as standard.