At the moment, this feature is used exclusively by Ace Combat 3, which uses it heavily in its missions to improve situational awareness.
But we know that it was implemented experimentally in f22, too. Specifically, this old screenshot from Polak exists (source):
F22 calls it East/West palettes. From redxxxx.txt:
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;────────────────────────────────────────────────────────────────────────
; new palette commands
; <east_palette> <start_altitude> <end_altitude> <west_palette>
; nb. (1) The altitude is specified in feet
; (2) If no west palette is given only one
; palette will be used within the altitudes.
;────────────────────────────────────────────────────────────────────────
So this feature could be implemented and it’s only a few lines of code, too. In DIDtoUAW F22 scenarios.cpp, in getSkyColors(), replace
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store(result->horizonSunny, GFX::linearFrom(load(palette[143])));
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store(result->horizonSunny, GFX::linearFrom(load(palette[255])));
result->horizonSunny.red *= 1.5f;
result->horizonSunny.green *= 1.5f;
result->horizonSunny.blue *= 1.5f;
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if(utc.i17f15 < 6 * 60 * 60 * 32768 || utc.i17f15 > 22 * 60 * 60 * 32768) // before 6 or after 22?