#block-sitewidecontactform-5 { 
  --button-font-color: #FFFFFF; 
  --button-background-color: #0076BE; 
  --button-border-color: transparent; 
  --button-border-color-hover: transparent; 
  --button-background-color-hover: #666064; 
  --button-font-color-hover: #FFFFFF; 
}