Links disappearing upon hover

Hello,
The hover on the page you sent does not disappear, it is white and the background is light. The predefined themes should not be used with advanced site colors. The css in the predefined theme will override the css in advance site colors. You should remove the predefined theme and use the advanced site colors. https://www.youtube.com/watch?v=IWqis8Y-Rus

Hello,
If you are using a sub theme here is the code colors for all the site.
Create a css file in your sub theme and paste this code inside it. Then change the color code for each region.

.page-wrapper {
  background-color: #f8f8f8;
  color: #3a3a3a;
}
#header {
  background-color: #bebebe;
}
.main-navigation-wrapper,
.close-nav,
.mobile-nav {
  background-color: #222;
  color: #efefef;
}
#welcome-text {
  background-color: white;
  color: #3a3a3a;
}
#highlighted {
  background-color: #efefef;
  color: #3a3a3a;
}
#top-container {
  background-color: #e4e4e4;
}
#top-container .first-top > div {
  background-color: #ededed;
  color: #3a3a3a;
}
#top-container .second-top > div {
  background-color: #ddd;
  color: #3a3a3a;
}
#top-container .third-top > div {
  background-color: #ededed;
  color: #3a3a3a;
}
#page-title {
  background-color: #4e4e4e;
  color: #efefef;
}
#main-container {
  background-color: #f8f8f8;
  color: #3a3a3a;
}
#bottom-container {
  background-color: #4d4d4d;
}
#bottom-container .first-bottom > div {
  background-color: #636363;
  color: #efefef;
}
#bottom-container .second-bottom > div {
  background-color: #525252;
  color: #efefef;
}
#bottom-container .third-bottom > div {
  background-color: #525252;
  color: #efefef;
}
#bottom-container .forth-bottom > div {
  background-color: #636363;
  color: #efefef;
}
#footer-container {
  background-color: #3a3a3a;
}
#footer-container .first-footer > div {
  background-color: #494949;
  color: #9f9f9f;
}
#footer-container .second-footer > div {
  background-color: #313131;
  color: #bebebe;
}
#footer-container .third-footer > div {
  background-color: #494949;
  color: #9f9f9f;
}
#footer-menu {
  background-color: #1e1e1e;
  color: #bebebe;
}
#copyright {
  background-color: #141414;
  color: #bebebe;
}