Hello @BCRC,
Thanks for asking. 
Please add following CSS under X > Launch > Options > CSS to change CSS of Contact Form button CSS:
.page-id-76 input.wpcf7-form-control.wpcf7-submit {text-shadow: 0 0.075em 0.075em rgba(0,0,0,0.3); box-shadow: 0 0.25em 0 0 hsl(124,2%,81%), 0 4px 9px rgba(0,0,0,0.75); color: hsl(0,0%,0%) !important; border-color: hsl(120,2%,77%); background-color: hsl(0,0%,95%) !important;}
.page-id-76 input.wpcf7-form-control.wpcf7-submit:hover {box-shadow: 0 0.25em 0 0 hsl(123,2%,23%), 0 4px 9px rgba(0,0,0,0.75); text-shadow: 0 0.075em 0.075em rgba(0,0,0,0.65); color: hsl(0,0%,100%) !important; border-color: hsla(0,0%,50%,0.25); background-color: hsl(62,1%,31%) !important;}
Thanks.