[Plugin: Grunion Contact Form] How to change text field Color & Text color

I tried using the WP “kitchen sink” tabs in edit however the change occurred on the edit form not on the site page I am not certain why as that font color change works on posts and other text inserts. Maybe it is because I am trying to change the text color in the HTML and that code has nothing to do with color. Probably need to ad some code for color ..which I do not know how to do, not knowing HTML that well.