Dynamic shadow

CSS, Visual

Creates a shadow similar to box-shadow but based on the colors of the element itself.

  • Use the :after pseudo-element with position: absolute and width and height equal to 100% to fill the available space in the parent element.
  • Use background: inherit to inherit the background of the parent element.
  • Use top to slightly offset the pseudo-element, filter: blur() to create a shadow and opacity to make it semi-transparent.
  • Use z-index: 1 on the parent and z-index: -1 on the pseudo-element to position it behind its parent.
Preview
<div class="dynamic-shadow"></div>
.dynamic-shadow {
  position: relative;
  width: 10rem;
  height: 10rem;
  background: linear-gradient(75deg, #6d78ff, #00ffb8);
  z-index: 1;
}

.dynamic-shadow:after {
  content: '';
  width: 100%;
  height: 100%;
  position: absolute;
  background: inherit;
  top: 0.5rem;
  filter: blur(0.4rem);
  opacity: 0.7;
  z-index: -1;
}

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