Add the following to the enabled theme’s style.css.
.page-links li a,
.page-links li.current span {
width: 22px;
height: 22px;
background: #c2c1c1;
border: none;
color: #fff;
text-decoration: none;
display: block;
}
.page-links li.current span,
.page-links li a:hover {
border: none;
background: #ea3b0a;
}
Or from setting up custom next page
Go to the style tab, and then select Edit Style Select the Style type
Style edit Please save the above code.