Blueprint CSS background

body {
  height: 100dvh;
  margin: 0;

  background-color: #06c;
  background-image: linear-gradient(rgba(255, 255, 255, 0.2) 2px, transparent 2px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.2) 2px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
  background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px;
  background-position: -2px -2px, -2px -2px, -1px -1px, -1px -1px;

  color: white;
}