{
  --cassiopeia-color-primary: #FFFFFF;
  --cassiopeia-color-hover: #000000;
  --cassiopeia-color-link: #000000;
  }
.container-header {
    background-color: #FFFFFF;
    background-image: none;
}
<script 

  src="https://www.paypal.com/sdk/js?client-id=BAAGuYyeye-VrS-34YTkhM4ssb3TT5GrBtE0rRHo-KQnbPw9Pu21EvpI22O8UdxZmP709p1egrk4oEsdBU&components=hosted-buttons&enable-funding=venmo&currency=USD">

</script>