how to style the disable text only on button code example

Example: on disabled attribute set button design change

<button id="btnSubmit" class="btn-disable">Click</button>

<style type="text/css">
    .btn-disable
        {
        cursor: not-allowed;
        pointer-events: none;

        /*Button disabled - CSS color class*/
        color: #c0c0c0;
        background-color: #ffffff;

        }
</style>