Outline Color in CSS

The outline-color property is utilized to set the color of the layout.

The color can be set by:

• name - specify a color name, like "red"
• HEX - specify a hex value, like "#ff0000"
• RGB - specify a RGB value, like "rgb(255,0,0)"
• HSL - specify a HSL value, like "hsl(0, 100%, 50%)"
• invert - performs a color inversion (which ensures that the outline is visible, regardless of color background)

The following example shows some different outlines with different colors. Also notice that these elements also have a thin black border inside the outline:

Example

.ex1 {
  border: 3px solid black;
  outline-style: solid;
  outline-color: green;
}

.ex2 {
  border: 3px solid black;
  outline-style: dotted;
  outline-color: red;
}

.ex3 {
  border: 3px solid black;
  outline-style: outset;
  outline-color: black;
}