A {text-decoration:none}

A.onblack:link {color: white} 
A.onblack:visited {color: white} 
A.onblack:active {color: white} 
A.onblack:hover {color: yellow} 
A.onwhite:link {color: blue} 
A.onwhite:active {color: blue} 
A.onwhite:visited {color: blue} 
A.onwhite:hover {color: 238e68}