Hi

Do you want it like this?

https://prnt.sc/M2u9sBNY061u

Then you have to use this custom CSS

#sppb-addon-1491976355541 .sppb-addon-class-routines .table-bordered > thead > tr > th:nth-child(1){
  background-color:#109dc2;
}

.sppb-addon-class-routines .table-bordered tbody tr > td:nth-child(1){
  background-color:#58c5e2;
}
#sppb-addon-1491976355541 .sppb-addon-class-routines .table-bordered > thead > tr > th:nth-child(2){
  background-color:#7918f2;
}

.sppb-addon-class-routines .table-bordered tbody tr > td:nth-child(2){
  background-color:#764aff;
}
#sppb-addon-1491976355541 .sppb-addon-class-routines .table-bordered > thead > tr > th:nth-child(3){
  background-color:#dc3545;
}

.sppb-addon-class-routines .table-bordered tbody tr > td:nth-child(3){
  background-color:#ff5757;
}
#sppb-addon-1491976355541 .sppb-addon-class-routines .table-bordered > thead > tr > th:nth-child(4){
  background-color:#198754;
}

.sppb-addon-class-routines .table-bordered tbody tr > td:nth-child(4){
  background-color:#23cf5f;
}
#sppb-addon-1491976355541 .sppb-addon-class-routines .table-bordered > thead > tr > th:nth-child(5){
  background-color:#f1c512;
}

.sppb-addon-class-routines .table-bordered tbody tr > td:nth-child(5){
  background-color:#ffd012;
}
#sppb-addon-1491976355541 .sppb-addon-class-routines .table-bordered > thead > tr > th:nth-child(6){
  background-color:#c26110;
}

.sppb-addon-class-routines .table-bordered tbody tr > td:nth-child(6){
  background-color: #c57212;
}

Path towards custom CSS: Extensions>Templates>Styles> Click on your current default template name then choose Template Options. Then find custom CSS within the custom code.