I use personal theme and successful fixed login button(mw-ui-button.mw-ui-constructive) color like that:
.mw-ui-button.mw-ui-constructive {
background: none repeat scroll 0% 0% #7EC0EE;
color: #D3D7CF;
border: 1px solid #7EC0EE;
text-shadow: 0px 1px rgba(0, 0, 0, 0.1);
}
.mw-ui-button.mw-ui-constructive:hover {
box-shadow: 0px 1px rgba(0, 0, 0, 0.1), 0px -3px rgba(0, 0, 0, 0.2) inset;
border-bottom-color: #7EC0EE;
But when I press button, button color changes to #00AF89 for second.
I tried set color to .mw-ui-button.mw-ui-constructive:active with no success. Can't catch active button state with inspect element