Swap the Color Scheme between regular and Network admins. For WP3.8 (and beyond, probably)

change-network-admin-color-scheme.php

<?php
// Plugin Name: Change Network Admin Color Scheme


if ( is_multisite() ) {
	add_filter( 'style_loader_src',          'cnacs_intercept_admin_color', 10, 2 );
	add_action( 'admin_color_scheme_picker', 'cnacs_network_admin_color_scheme_picker');
	add_action( 'personal_options_update',   'cnacs_update_network_admin_option' );
	add_action( 'edit_user_profile_update',  'cnacs_update_network_admin_option' );
}


// change 'admin_color' when requested for Network Admin
function cnacs_intercept_admin_color($arg1, $arg2) {
	if ( is_network_admin() ) {
		add_filter('get_user_option_admin_color', 'cnacs_get_user_option_admin_color', 10, 3 );
	}
	return $arg1;
}

// return network color option in place of regular
function cnacs_get_user_option_admin_color( $result, $option, $user ) {
	remove_filter('get_user_option_admin_color', 'cnacs_get_user_option_admin_color', 10, 3 );

	$network_admin_color = get_user_meta( $user->ID, 'network_admin_color', true );
	if ( empty( $network_admin_color ) ) return $result;

	return $network_admin_color;
}


// attempt to add option in user-edit. it's meh.
function cnacs_network_admin_color_scheme_picker() {
	global $profileuser;
	if ( ! is_super_admin( $profileuser->ID ) ) return;

	echo '<h3>Network Color</h3>';

	add_filter('get_user_option_admin_color', 'cnacs_get_user_option_admin_color', 10, 3 );
	ob_start();
	admin_color_scheme_picker( $profileuser->ID );
	$picker = ob_get_clean();
	remove_filter('get_user_option_admin_color', 'cnacs_get_user_option_admin_color', 10, 3 );

	$picker = str_replace( 'admin_color', 'network_admin_color', $picker );
	echo $picker;
}

// save profile preference
function cnacs_update_network_admin_option( $user_id ) {
	if ( ! isset( $_POST['network_admin_color'] ) ) return;

	global $_wp_admin_css_colors;
	$allowed = array_keys( $_wp_admin_css_colors );

	$newcolor = in_array( $_POST['network_admin_color'], $allowed ) ? $_POST['network_admin_color'] : '';

	update_user_meta( $user_id, 'network_admin_color', $_POST['network_admin_color'] );
}