#meuselect {  
width:125px;
background:#FFDE4A; 
font:11px arial, helvetica, sans-serif; 
color:#000000;
}
#meuselect option.impar { 
width:125px;  
background-color:#00005A; 
color:#FFDE4A;
}
#meuselect option.par { 
width:125px;  
background-color:#FFDE4A; 
color:#00005A;
}