Stick this in a computed for display field near the top of a form and enable Pass Thru HTML.
@newline+
"<style type=\"text/css\">"+@newline+
"<!--"+@newline+
"a { text-decoration: none}"+@newline+
"td { font-family: arial }"+@newline+
"td { font-size: 10pt }"+@newline+
"A:hover {color:#1010ff;}"+@newline+
"-->"+@newline+
"</style>"
The hover colour is set as a blue.
Red is #ff0000 Green is #0000ff White is #ffffff etc
This uses style sheets so will not work on older browsers,
but it will not break the code if the user is using an older browser.