Hi there,
the Pro version of WP Show Posts allows you to change colors etc.
Alternatively try this CSS:
/* Title color */
.wp-show-posts .wp-show-posts-entry-title a {
color: #666666;
}
/* Title hover color */
.wp-show-posts .wp-show-posts-entry-title a:hover {
color: #555555;
}
/* Post meta color */
.inside-article .wp-show-posts-meta a,
.inside-article .wp-show-posts-meta a:visited {
color: #666666;
}
/* Post meta hover color */
.inside-article .wp-show-posts-meta a:hover {
color: #555555;
}