1. First, select the HTML element from the form and drag it onto the form. Then, click on the settings of that HTML element.

- Navigate to 'Display,' and in 'Content,' paste this code. You can change the color where it mentions 'red' according to your preference.
<style>
.form-group button.btn {
background: red !important;
border-color: red !important;
} </style>

3. And save the changes.