The ViewSonic PJD6531w produced a lot of light and had good color performance—after it was calibrated.
Our color temperature test looks at the consistency of the whites: do they stay at the same color temperature as their brightness decreases towards black? The basic answer for this projector is yes: we saw only very minor (and pretty much unnoticeable) changes in color temperature, meaning that this projector produces very consistent whites.
We were also impressed with the color performance of this projector: we saw a very smooth, accurate response to changes in the intensity of the red, green and blue primary colors, meaning that this projector can accurately reproduce subtle changes in colors on the screen. This makes for smooth gradations of color, such as skies and shadows.
The only major issue that we saw on this projector was an inaccurate color gamut, which is the range of colors that a projector can reproduce. A standard high definition TV signal should contain colors within a certain gamut defined in a standard called Rec.709, so a projector should produce the same range. The PJD6531w didn't quite manage this: reds and greens were a little off, but the blue was very inaccurate, meaning that the blues in images are going to look a lot more violet than the originals.
Below are the color coordinates of the Rec.709 standard, our measurements, and the difference between the two.
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