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A slice of color space shows the reinterpretation of digital codes. Straight RGB (left) and RGB using HOT primaries, simulated with sRGB (right)
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This slice contains three full primaries and the blending between them. It also contains a complement (secondary color, yellow). Several things should be noted. The simulation of the HOT colors preserves hue strictly, resulting in lightness and saturation shifts. This is particularly noticeable with the red primary, a "vermillion" on many CRT displays, but a very deep (656 nm) red in the HOT system. Because the CRT cannot make this deep red, a less saturated red is subsituted, appearing almost pink. This is the correct hue, but not the correct saturation or intensity of the color that would be seen on a true HOT display. The same behavior occurs for the green primary, but it is quite clear that the Oxygen-3 emission line is a bluish-green, not the yellow-green used on most CRTs. Because of the relationship between the HO green and red, yellow is a difficult color to make. On chromaticity diagrams, this is obvious from the gamut triangle. A pale whitish-yellow is the best that can be made. Blue remains fairly similar, though the full primary blue is slightly deeper for the HOT system, also apparent from the chromaticity diagrams. |
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