Having spent a bit more time with the Klein K10-A probe I profiled the Sony monitor we hired to practice on.
Here you can see the colour gamut for the displayed compared to the Rec709 colour space for television.
It is an excellent match with the green extremity being a tiny bit mis-matched. I would not expect to see this from either a CRT or LCD monitor.
The white curved line is the "black body locus" and is where physicists define the colour of white.
1. Gamut measurements
White Field
Video x y Y
255 .313 .336 136.45
Red Field
Video x y Y
255 .639 .332 28.35
Green Field
Video x y Y
255 .296 .603 99.75
Blue Field
Video x y Y
255 .149 .060 9.47
EBU Overlap Gamut Value: 98.4%
2. Gamma measurements
White Field
Video x y Y
235 .313 .334 110.99
207 .313 .334 83.10
180 .314 .336 58.14
153 .315 .337 37.74
125 .317 .338 22.35
97 .319 .341 11.39
70 .324 .347 3.50
43 ---- ---- 0.39
16 ---- ---- 0.01
Red Field
Video x y Y
235 .640 .332 24.30
207 .641 .332 17.79
180 .642 .332 12.87
153 .645 .332 7.72
125 .651 .333 4.20
97 .664 .332 1.88
70 .671 .325 0.65
43 ---- ---- 0.09
16 ---- ---- 0.01
Green Field
Video x y Y
235 .296 .603 81.12
207 .297 .603 57.73
180 .297 .604 39.60
153 .297 .604 25.74
125 .297 .608 14.55
97 .297 .614 6.97
70 .296 .638 2.27
43 ---- ---- 0.26
16 ---- ---- 0.01
Blue Field
Video x y Y
235 .149 .060 8.19
207 .149 .059 5.73
180 .149 .059 3.89
153 .148 .058 2.39
125 .147 .056 1.29
97 .143 .053 0.54
70 ---- ---- 0.18
43 ---- ---- 0.02
16 ---- ---- 0.01
You can see that the colour of white through grey tracks very well until you get to within 15% of black; you can generally accurately read the luminance level down to sub 1Cd/m2 but colour measurements become too noisy down there. The K10-A seems to perform better than our DK PM5639 in this respect.
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