[Feature] Add support for specific kanban card color.

[Quorafind]

After the newest update of Kanban #181, now we are allowed to modify specific card with specific tag by using css.

like:

.kanban-plugin .has-tag-A .kanban-plugin__item-title-wrapper  {
  background: #fee9f4 !important; 
}

.kanban-plugin .has-tag-A .kanban-plugin__item-content-wrapper {
  padding: .3em .3em .3em .3em !important;
  border-radius: .025em !important;
  background: #fee9f4 !important; 
}

.kanban-plugin__item .has-tag-A {
  background: #fee9f4 !important; 
}

to change a card's color by using tag A .

So don't know if it is possible to add support to modify the css easily in style setting. If it is doable, please consider add this support.

[chetachiezikeuzor]

Hmm. This won't be possible with just pure css. In order to do this, I would need to declare variables based on user input, which just can't be done with css alone. I think it would be best to submit an issue on the Kanban Plugin repo. Sounds like a fun feature!