RGB is not a color space but a color model. sRGB or ACEScg are color spaces. CMYK or RGB etc. are color models. This matters a lot. And yeah, it seems this s

RGB is not a color space but a color model. sRGB or ACEScg are color spaces. CMYK or RGB etc. are color models. This matters a lot. And yeah, it seems this supports neither and it is unclear if operations happen in linear light at a bit depth of at more that 8bit/channel. If they don't, most of them will produce subtly wrong results.