Evan,

>How can I apply a CSS to input items such as radio buttons and checkboxes. Currently the font for the choices is black, but I would like (via a CSS) to change them to blue.

Since the text for radio buttons or checkboxes is outside the actual tag, you might have to wrap the text in a SPAN section and give the span a class name that is contained in the CSS.

span.spanblue {
  color:blue
}

<input type="checkbox" id="something"><span class="spanblue">Blue Text</span>