Change Font Size and Color in 2010

You can change those properties by adding some rules to style.css. You should create a Child theme to make your changes. If you do not, all of your changes will be lost if you update your theme.

Try adding lines like these to the end of your child theme’s style.css:

#site-title a {
   font-size: 60px;
   color: red;
}
#site-description {
   font-size: 30px;
   color: red;
   width: 500px;
   margin-top: -50px;
}

Change the values to suit yourself.