wp show posts button hover color

I’m using your WP Show Posts plugin. The “More Reading” button is generally white with a yellow outline. When hovering it turns black with a white text. It does not seem to pick up the button colors I’ve set up in my theme. Is there a way I can change it so that it will pick up the theme button colors?

I’ve tested something like this but it doesn’t fix the button color when hovering.

/* wp show post button color */
wp-show-posts-read-more {
display: inline-block;
padding: 8px 15px;
border: 2px solid #980000;
border-radius: 3px;
color: #980000;
font-size: 0.8em;
text-decoration: none;
}

a.wp-show-posts.read.more:visited {
box-shadow: 0 0 0 transparent;
display: inline-block;
padding: 8px 15px;
border: 2px solid #656f91;
background: #656f91;
border-radius: 3px;
color: #ffffff;
font-size: 0.8em;
text-decoration: none;
}