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CSS

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HTML 

              
                <div>
  <div class="scene">
    <div class="card">
      <div class="card-face card-face-front">FRONT</div>
      <div class="card-face card-face-back">BACK</div>
      <div class="card-face card-face-right">RIGHT</div>
      <div class="card-face card-face-left">LEFT</div>
      <div class="card-face card-face-top">TOP</div>
      <div class="card-face card-face-bottom">BOTTOM</div>
    </div>
  </div>

  <div class="padding"></div>
</div>
!

CSS 

              
                :root {
  --card-max-width: 640px;
  --card-max-height: 300px;
  --card-thickness: 40px;
}

body {
  font-family: Sans-Serif;
  font-size: 2rem;
  font-weight: 900;
}

.padding {
  height: 1000px;
}

.scene {
  /* Arbitrary values, just use the ones that better suits your webpage */
  width: 40vw;
  height: 25vw;
  /* First use of the variables, our scene can't be larger than our card */
  max-width: var(--card-max-width);
  max-height: var(--card-max-height);
  /* Small values of perspective makes it look like we are using a fisheye lens
     while large values places the camera far away as if we were using a tele-objective */
  perspective: 4000px;
  position: fixed;
}

.card {
  width: 100%;
  height: 100%;
  max-width: var(--card-max-width);
  max-height: var(--card-max-height);
  position: relative;
  /* Forces child elements (all faces) to be positioned in 3D space */
  transform-style: preserve-3d;
  /* Our first equations! Read below 👇 */
  transform-origin: 
    /* x-offset */ calc(0.5 * var(--card-max-width))
    /* y-offset */ calc(0.5 * var(--card-max-height)) /* z-offset */
    calc(0.5 * var(--card-thickness));
  /* Just a short transition to make animations smooth */
  transition: transform 0.6s ease-out;
}

.card-face {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-face-front,
.card-face-back {
  /* Front and back faces just fill the horizontal space */
  height: 100%;
  width: 100%;
}

.card-face-front {
  /* Move the front card half the thickness up */
  transform: translateZ(calc(0.5 * var(--card-thickness)));
  background-color: #390099;
}

.card-face-back {
  transform: 
	  /* Rotate the back card in two axis so that it looks good when fully rotated */ rotateY(
      180deg
    )
    rotateZ(180deg) /* Move the back card half the thickness down */
    translateZ(calc(0.5 * var(--card-thickness)));
  background-color: #9e0059;
}

.card-face-left,
.card-face-right {
  width: var(--card-thickness);
  height: var(--card-max-height);
  /* Position left and right faces at the horizontal center of the cube */
  left: calc(0.5 * (var(--card-max-width) - var(--card-thickness)));
}

.card-face-left {
  /* Left side faces left and is placed at the left end of the cube */
  transform: rotateY(-90deg) translateZ(calc(0.5 * var(--card-max-width)));
  background-color: #ff0054;
}

.card-face-right {
  /* Right side faces right and is placed at the right end of the cube */
  transform: rotateY(90deg) translateZ(calc(0.5 * var(--card-max-width)));
  background-color: #ff5400;
}

.card-face-bottom,
.card-face-top {
  width: var(--card-max-width);
  height: var(--card-thickness);
  /* Position left and right faces at the vertical center of the cube */
  top: calc(0.5 * var(--card-max-height) - 0.5 * var(--card-thickness));
}

.card-face-bottom {
  /* Bottom side faces down and is placed at the bottom of the cube */
  transform: rotateX(-90deg) translateZ(calc(0.5 * var(--card-max-height)));
  background-color: #ffbd00;
}

.card-face-top {
  /* Top side faces up and is placed at the bottom of the cube */
  transform: rotateX(90deg) translateZ(calc(0.5 * var(--card-max-height)));
  background-color: #ffbdbd;
}
!

JS 

              
                const SCROLL_UNTIL_FULL_ROTATION_PX = 500;

/**
 * Clamp restricts a certain value X between a Min and Max values.
 * If X < Min then Min is returned
 * If X > Max then Max is returned
 * Else X is returned
 */
const clamp = (min, max, x) => Math.min(max, Math.max(min, x));
/**
 * Lerp stands for Linear Interpolation. Given two values X and Y
 * and normalized value T between 0 and 1, it returns a value between
 * X and Y that is proportional to the value T.
 * If T < 0 then X is returned
 * If T > 1 then Y is returned
 * Else linear interpolation is returned
 */
const lerp = (x, y, t) => clamp(x, y, x * (1 - t) + y * t);

document.addEventListener("DOMContentLoaded", () => {
  const card = document.querySelector(".card");
  let scrollRotation = 0;

  document.addEventListener("scroll", () => {
    scrollRotation = lerp(
      0,
      360,
      window.scrollY / SCROLL_UNTIL_FULL_ROTATION_PX
    );
    card.style.transform = `rotateX(${scrollRotation}deg)`;
  });
});
!
999px

Console