Changing color of vertical lines

[Heras]

Hello and thanks in advance.
I would like to change the color of this vertical lines:

How can I do that?
Thanks again!

[thai]

Hi There,

It might be the border color of your column, please try adding this element CSS to your column:

$el {
     border-color: #f00f00;
}

If it doesn’t work, please provide us with your website URL so we can take a closer look.

Thanks.