Use border spinners as lightweight loading indicators.

Use text color utilities like .text-primary, .text-success, or .text-danger to style the spinner, which inherits its color from currentColor.

Bootstrap spinners use rem, currentColor, and inline-flex for easy sizing and alignment.

Bootstrap spinners use rem, currentColor, and inline-flex for easy resizing, coloring, and alignment.

The grow spinner also uses currentColor, so apply classes like .text-primary, .text-warning, or .text-info to customize its color.