question on field colors

I just downloaded this plugin.

First as soon as I click on the Skin/Style ICF7 tab it tells me this feature is only available on the Pro version. What is this referring to?

Second, I style the text field background to a particular color. I noticed that when I saved the form, which is a simple contact us form, all the text fields start with that color except for the drop down list. How do you color the background of a drop down list?

And when I click and type into the text fields (name, email address) it displays a different background color but when I click and type into the textarea field (comment) the background color does not change.