<svg viewBox="-130 -20 300 100">
  <g id="cube" class="cube-unit">
    <rect width="21" height="24" fill="#00affa" stroke="#0079ad" transform="skewY(30)"/>
    <rect width="21" height="24" fill="#008bc7" stroke="#0079ad" transform="skewY(-30) translate(21 24.3)"/>
    <rect width="21" height="21" fill="#009CDE" stroke="#0079ad" transform="scale(1.41,.81) rotate(45) translate(0 -21)"/>
  </g>
</svg>
.cube-unit {
  fill-opacity: .9;
  stroke-miterlimit: 0;
}

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