Hello,

Please add this code to the Theme Settings > Custom CSS > Global:

.wd-info-box.box-style-bg-hover .info-box-inner {
	transition: all .25s ease;
}

.wd-info-box.box-style-bg-hover:hover .info-box-inner {
	color: #FFF !important;
}

Please replace the color as per your needs.

Best Regards