Changing the color of first letting in drop down menu - Navigation

Site URL: https://wellegacyinstitute.squarespace.com/

Hi there,

I am looking to change the color of the first letting of the pages in the navigation drop-down menu. I have figured out how to change the first menu item in the drop down using the code below, but can't figure out how to change the rest. Screen shot attached!

Any suggestions? The site is password protected, the password to take a look is scocreativeclient

Current code:

.header-nav .header-nav-item--folder .header-nav-folder-content:first-letter{
  color: #B1602D;
}

You mean

Change

2 W (first item)

2E (second item)

2L (third item)

?