Thats the hassle with colors on the net. There are only a few ‘web safe” colors that will rendered perfectly on all browsers. The beauty is you can control which colors you use fairly easly. Css is your friend in this. for example
#ja-cssmenu li ul a:hover, #ja-cssmenu li ul a:active, #ja-cssmenu li ul a:focus, #ja-cssmenu ul li:hover, #ja-cssmenu ul li.sfhover, #ja-cssmenu ul li.havesubchildsfhover, #ja-cssmenu ul li.havesubchild-activesfhover, #ja-cssmenu ul ul li:hover, #ja-cssmenu ul ul li.sfhover, #ja-cssmenu ul ul li.havesubchildsfhover, #ja-cssmenu ul ul li.havesubchild-activesfhover {
color: #FFFFFF !important;
}
shows u that the color white is used for hover . You can find all this information using my tips below.
Hope this helped