Plugin with hued color outline on task boxes


I just installed kanboard on a new *nix box, and I have used a plugin in the past that provided a hued color outline of the task boxes, such that the boxes themselves aren’t filled with color. I can’t seem to load any plugins that provide that effect.

Does anyone have any idea which plugin that might be? I think I have tried loading all the different theme plugins available, and none of them seemed to provide the desired effect.