Genesis color styles.

color-styles.css

.theme-blue a,
.theme-blue a:visited {
	color: #0d72c7;
}

color-styles.php

<?php
//* Do NOT include the opening php tag

//* Create blue, green, orange and red color style options
add_theme_support( 'genesis-style-selector', array(
	'theme-blue'	=> __( 'Blue', 'themename' ),
	'theme-green'	=> __( 'Green', 'themename' ),
	'theme-orange'	=> __( 'Orange', 'themename' ),
	'theme-red'	=> __( 'Red', 'themename' )
) );