one sided table border - can anyone help

can anyone help with this

I am working on a joomla site which is here you will see on the property search box its surrounded by a blue box. I am looking to have the border on the left one color and make the others transparent

All I know is I need to change something here but am not sure what

.pollstableborder {
  width: 100%;
  border: 1px solid #1A2B48;
  padding: 2px; 
}

Code (markup):

any help really appreciated

 

.pollstableborder {
  width: 100%;
  border: 1px solid transparent;  /*or parent background color*/
  border-left-color: #1A2B48;
  padding: 2px; 
}

Code (markup):

cheers,

gary

 

thank you!