coloured-vertical-stack:
  default:
    - color: "black"
  card:
    type: custom:mod-card
    card_mod:
        style: |
          ha-card {
            --primary-color: [[color]];
            margin: 20px var(--main-layout-card-margin) 0;
          }
    card:
      type: vertical-stack
      cards: "[[cards]]"