I am trying to change the color of the first option to grey color, that only the text (select one option) but here it\'s not working here:
I was recently having trouble with this same thing and I found a really simple solution.
All you have to do is set the first option to disabled and selected. Like this:
This will display the first option (grayed out) when the page is loaded. It also prevents the user from being able to select it once they click on the list.