1. CSS caret-color

    The `caret-color` property allows the color to be set of the caret (blinking text insertion pointer) in an editable text area.

  2. CSS print-color-adjust

    The `print-color-adjust` (or `-webkit-print-color-adjust` as prefixed in WebKit/Blink browsers) property is a CSS extension that can be used to force printing of background colors and images.

  3. css property: text-decoration-line: blink

  4. javascript built-in: string: blink