Dropdown menu 50% transparent

Hi,

I have the code to make the background of the dropdown menus on the main page transparent.

.header-nav-folder-content {
  background: transparent !important;
}

I am looking to see if there is a code or an adjustment to this code so that the background can be 50% transparent?

thanks!

nevermind I got it!

/* Dropdown color */
.header-nav-folder-content {
background-color: rgba(0,0,0,0.5) !important;

you can also search rgba color picker tool.  you will get 3 numbers.  Put those instead of the first three zeros, and then the last one sets the transparency (so .1 is more transparent than .5).  Don't know what I'm doing but this worked for me at least haha