Monitor Adjustment: you should be able to see 17 different shades in above.  If you do not see differences at both ends of the wedge you are definitely missing out.  You can  adjust your monitor and/or room lighting until you do.  Newer images on this website are best viewed at high resolutions on a large, well-calibrated display device.  I switched to an "HD" 1920 by 1200 pixel HP LP2475W monitor with an IPS panel providing a very wide gamut in 12/2008.  After that one got dinged up, I upgraded to a Dell UltraSharp U3011 30" Monitor in 2011!  That one is still going strong in 2017.