A style for Caards.

stellae.css

html {
  height: 100%;
   background: #00183b url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/1231630/stars.png) repeat;
  animation: 500s para infinite linear;
  }

@keyframes para {
  100% {
    background-position: 
      -5000px 20%
    }
  }

.Caard {
    background-color: #00112b;
}

.Caard[caard-type="fullscreen"] {
    background-color: #00000000;
}

.AB-Card {
    background-color: #01193d !important;
}

.Widgets-Container button {
    background-color: #01193d !important;
}

.Widgets-Container div {
    background-color: #011e49 !important;
}