Footer Website Button Link

We need to draw attention to onlookers to click a button image inside the footer area and link it to a website is this possible instead of having the yellow text

 

Hello,

Paste this code in Custom CSS
Appearance > Theme Option > Styling Option > Custom CSS

Code:

.textwidget span a {
background: blueviolet;
padding: 10px;
border-radius: 20px;
color: yellow;
}