30 seconds of CSS

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Triangle  visual

Creates a triangle shape with pure CSS.

HTML
<div class="triangle"></div>
CSS
.triangle {
  width: 0;
  height: 0;
  border-top: 20px solid #333;
  border-left: 20px solid transparent;
  border-right: 20px solid transparent;
}
Demo
Explanation
  • View this link for a detailed explanation.
  • The color of the border is the color of the triangle. The side the triangle tip points corresponds to the opposite border-* property. For example, a color on border-top means the arrow points downward.
  • Experiment with the px values to change the proportion of the triangle.
Browser support

100.0%