.outer {
  padding: 4px;
}

.row {
  flex-direction: row;
}

.color0 {
  background-color: #222;
}

.color1 {
  background-color: #666;
}

.color2 {
  background-color: #999;
}

.color3 {
  background-color: blue;
}

.color4 {
  background-color: orange;
}

.color5 {
  background-color: red;
}

.fixed {
  width: 20px;
  height: 20px;
}