.button-link.gmail:hover, .button-link.messenger:hover, .button-link.wordpress:hover, .button-link.whatsapp:hover, .button-link.instagram:hover, .button-link.googleplus:hover, .button-link.twitter:hover, .button-link.twitter2:hover, .button-link.linkedin:hover, .button-link.youtube:hover, .button-link.youtube2:hover {
    filter: brightness(0.75) contrast(2.2);
}