How to: Use CSS to change the default body font color in post pages?

Hi! I tried changing the default body text color in post pages by putting an item for the "body" selector name in the CSS file for my child theme. For example, body { color: #222222; /* Make default post text a darker gray */ } This changed the color of some of the text on the main page, but did not change the text color in the post pages. Can someone offer a suggestion? Thanks!