Three-quarters of the way through our product-testing regimen, we saw HP’s unremarkable 23-inch display headed toward a verdict of 6 or 7. It has a couple of nice features—as well as a couple of odd omissions—but at that point we hadn’t encountered anything that would set it apart from the crowd either way. But then we came to the Extreme Grayscale phase of the DisplayMate benchmark and our eyes just about popped out of their sockets. This test renders extremes in the grayscale, beginning with boxes of increasingly intense shades of gray displayed on black and then white backgrounds. The w2338h had no problems passing the first half of this test, and it performed as expected when we cycled through shades of blue, red, and magenta. But the monitor proved incapable of differentiating between any of the high-intensity shades of green displayed on a fully saturated green background. What should have been cyan boxes on a cyan background showed up as yellow, and what should have been yellow boxes on a yellow background were rendered green, instead.