Board Thread:Support Requests - Getting Technical/@comment-24665976-20151217183639/@comment-1757994-20151217221009

You can do something like  .spoiler { border: 1px dotted #000; }

.spoiler, background-color: #fff; color: #fff; background-image: none; }
 * 1) mw-content-text .spoiler a {

.spoiler:hover { color: #000; }

color: #36b; }
 * 1) mw-content-text .spoiler:hover a {