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.