Font color in excerpts in main body

First, the template is excellent and I’m considering buying it but it’s not up to me. But I may decide to buy from my pocket…
Second, I am observing that in the main screen, where all the entries appear with their corresponding photograph, the excerpts always appears (regardless of the font chosen for the site) of a very light gray color that in some screens doesn′t look very clear. In the customization, the color choice of that excerpts text is not an option. Is there any way to change that color in the style plate? Can I change it in CSS style? Where is it?
Third, sorry my english…