excalidraw/src/components/RoomDialog.scss

.RoomDialog-modalButton.is-collaborating {
  background-color: #ebfbee; // OC GREEN-0
  color: #2b8a3e; // OC GREEN-9
}

.RoomDialog-modalButton-collaborators {
  min-width: 1em;
  position: absolute;
  bottom: -5px;
  right: -5px;
  padding: 3px;
  border-radius: 50%;
  background-color: #40c057; // OC GREEN-6
  color: #fff;
  font-size: 0.7em;
  font-family: var(--ui-font);
}

.RoomDialog-linkContainer {
  display: flex;
  margin: 1.5em 0;
}

.RoomDialog-link {
  min-width: 0;
  flex: 1 1 auto;
  margin-left: 1em;
  display: inline-block;
  cursor: pointer;
  border: none;
  height: 2.5rem;
  line-height: 2.5rem;
  padding: 0 0.5rem;
  white-space: nowrap;
  border-radius: var(--space-factor);
  background-color: #eee;
}

.RoomDialog-link:hover {
  background-color: #eee;
}

.RoomDialog-link:focus {
  outline: none;
  box-shadow: 0 0 0 2px steelblue;
}

.RoomDialog-sessionStartButtonContainer {
  display: flex;
  justify-content: center;
}

.RoomDialog-stopSession {
  background-color: #ffe3e3; // OC RED-1
  color: #c92a2a; // OC RED-9
}