Front page menu & newsletter color changes

If you add this to your CSS it should change the font color in the header –

.site-header .genesis-nav-menu a {
	color: #333;
}

Change the newsletter section by editing this part of your css on line 2201

.home-bottom-footer {
	background-attachment: fixed;
	background-color: #16aaf3;
	background-position: 50% 0;
	background-repeat: no-repeat;
	-webkit-background-size: cover;
	-moz-background-size:    cover;
	background-size:         cover;
	text-align: center;
}