fitbit-health-overlay-test/resources/styles.css

#background {
  viewport-fill: red;
}

.healthTextLabel {
  font-size: 28;
  font-family: System-Regular;
  font-weight: regular;
  text-length: 8;
  text-anchor: end;
  fill: white;
}

#overlay {
  display: none;
}

#overlayShadeColor {
  fill: black;
}