How to use an external html, css menu

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Hello! The default autonav looks really bad on my website, I've got too many complaints, so I found this free menu and need help using it ie. copy paste HTML into the block but how do I use the CSS of the menu?

Also mouse over the menu shows a green drop down submenu, I would like to change the color to sky blue, but I can't find the part of the CSS where this is. Appreciate any assistance! :)

Link to it for reference:http://cssmenumaker.com/builder/260007...

#cssmenu ul,
#cssmenu li,
#cssmenu span,
#cssmenu a {
  margin: 0;
  padding: 0;
  position: relative;
}
#cssmenu {
  height: 49px;
  border-radius: 5px 5px 0 0;
  -moz-border-radius: 5px 5px 0 0;
  -webkit-border-radius: 5px 5px 0 0;
  background: #141414;
  background:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAxCAIAAACUDVRzAAAAA3NCSVQICAjb4U/gAAAALElEQVQImWMwMrJi+v//PxMDw3+m//8ZoPR/qBgDEhuXGLoeYswhXg8R5gAAdVpfoJ3dB5oAAAAASUVORK5CYII=) 100% 100%;

 
tallacman replied on at Permalink Best Answer Reply
tallacman
The green is in these 4 statements:


#cssmenu .has-sub ul li a {
  background: #71b00c;
  border-bottom: 1px dotted #aad06d;
  filter: none;
  font-size: 11px;
  display: block;
  line-height: 120%;
  padding: 10px;
}
#cssmenu .has-sub ul li:hover a {
  background: #528009;
}
#cssmenu .has-sub .has-sub ul li a {
  background: #528009;
  border-bottom: 1px dotted #97b36b;