Hello,
I'm wondering if you're able to change the CSS for border-color and box-shadow. This is what I was trying in the CustomCSS:
contactform {
-webkit-box-shadow: inset 0px 0px 2px #540C69;
-moz-box-shadow: inset 0px 0px 2px #540C69;
}
Here is the site.
All the best