it will be much easier to help if we have a site to see your specific Button.
if you mean in general these shortcode buttons http://kriesi.at/themes/enfold/shortcodes/buttons/
there are rules for every defined color.
if you want to change every hover button text color you can add this:
.avia-button:hover {
color: #0a2907 !important;
}
but if you want to change only one specific colored Button (and this makes sense because a gray in a silver button is not good) we had to see the example
in that case e.g.
.avia-button.avia-color-silver:hover {
color: #0a2907 !important;
}
Hey!
Please see @guenni007’s post above. If that does not help, please post the link to your website
@guenni007 Thanks Guenter :)
Cheers!
Yigit