CSS Tip

Custom dashed border

Create a custom dashed border using a few lines of code.

A custom dashed border

.dashed {
  --b: 5px;  /* border thickness */
  --s: 30px; /* size of the dashes */
  --c1: #215A6D;
  --c2: #92C7A3;
  
  position: relative;
}
.dashed::before {
  content:"";
  position: absolute;
  inset: 0;
  padding: var(--b);
  background: 
    repeating-conic-gradient(var(--c1) 0 25%,var(--c2) 0 50%) 
    0 0/var(--s) var(--s) round;
  mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  mask-composite: exclude;
}

See the Pen Custom dashed border by Temani Afif (@t_afif) on CodePen.