In regards to phosphor gamuts- the following is taken from the readme for guest-advanced (emphasis added). The same thing applies to the grade phosphor gamuts.
“CRT colors” changes the default colors to something more close to what the RGB Phosphors in CRTs produce.
These profiles are about subtle changes, but if you were used to the display of CRTs you may remember the display having more vivid greens, softer yellows and red, etc. It all depends on the type of CRT you were looking at, but admittedly CRT colors are different from the default sRGB color gamut that is prevalent in today’s LCD screens.
The CRT colors are based on research of the CIE chromaticity coordinates of the most common phosphors used back in the day. Therefore we ended up with 3 “specs” which are EBU standard phosphors, P22-RGB phosphors and the SMPTE-C standard. These three profiles can be selected under “CRT colors” as number 1, 2 and 3.
Then there are two additional “calibrated” profiles that actually quite closely match a Philips based CRT monitor and a Trinitron monitor. They are profile number 4 and 5.
Some more information on these profiles can be read below.
The main drawback currently is that Phosphor color primaries are partly outside the sRGB spectrum, such that for these profiles a “Wide Color Gamut” monitor is needed / recommended. This is what the “Color space” option is for. If you happen to own a monitor that is able to display DCI-P3 color gamut, then set this option to “1”. Option “2” is for AdobeRGB and “3” for Rec. 2020. DCI-P3 is verified to be quite accurate.
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