Change background color of pencil icon box

I used the code below to substitute an image instead of the pencil icon , however the grey background color of the box is still there, how can I change it to white ?

.blog-meta span.iconfont {
background-image: url(https://sprenzlaw.com/wp-content/uploads/2019/01/sprenz-law-new-logo-layout-2.png);
background-size: contain;
background-repeat: no-repeat;
background-position: center center;
}
.blog-meta span.iconfont:before { display: none; }