I personally use these colors
$colortrafficup = array("0000ff", "000000"); /* mod */
$colortrafficdown = array("de0202", "00c000"); /* mod */
$colortraffic95 = array("ece904", "808080" ); /* mod */
$colorpacketsup = array("0000ff", "000000"); /* mod */
$colorpacketsdown = array("de0202", "00c000"); /* mod */
$colorstates = array('ece904','757575','0000ff','00c000','de0202'); /* mod */
$colorprocessor = array('ece904','00c000','0000ff','ff0000','808080','000000'); /* mod */
$colormemory = array('c00000','00c000','0000ff','ffff00','808080','000000'); /* mod */
$colorqueuesup = array('666666','00ff00','ff0000','0000ff','ff8000','9f00ff','ff00ff','00dfff','ffdf00'); /* mod */
$colorqueuesdown = array('666666','000080','008000','800000','804000','500080','800080','007080','807000'); /* mod */
$colorqueuesdropup = array('666666','00ff00','ff0000','0000ff','ff8000','9f00ff','ff00ff','00dfff','ffdf00'); /* mod */
$colorqueuesdropdown = array('666666','000080','008000','800000','804000','500080','800080','007080','807000'); /* mod */
$colorqualityrtt = array('ff0000','ece904','808080','0000ff','00c000','000000'); /* mod */
$colorqualityloss = "de0202"; /* mod */
$colorwireless = array('990000','a83c3c','b36666');
$colorspamdtime = array('DDDDFF', 'AAAAFF', 'DDDDFF', '000066');
$colorspamdconn = array('00AA00BB', 'FFFFFFFF', '00660088', 'FFFFFF88', '006600');
$colorvpnusers = array('de0202'); /* mod */
$colorcaptiveportalusers = array("000000"); /* mod */