Gradience/data/style.css

.variant {
    padding: 0;
    border-radius: 100%;
  }

  .variant radio {
    color: transparent;
    background-color: inherit;
    border: 2px solid transparent;
  }

  .variant:checked radio {
    border: 2px solid @accent_bg_color;
  }

  #dark {
    background-color: #3d3846;
  }

  #light {
    background-color: #deddda;
  }

  #red {
    background-color: #e01b24;
  }

  #orange {
    background-color: #ff7800;
  }

  #yellow {
    background-color: #f6d32d;
  }

  #blue {
    background-color: #3584e4;
  }

  #green {
    background-color: #33d17a;
  }