![]() In HDR mode the operating system reads the color profile data from the display and correctly maps application colors to the range of color supported by the display. In SDR mode the Windows operating system does not read the color profile data from the display, simply assuming that the display is exactly 100% sRGB (Rec.709) color gamut. The default brightness of SDR applications, in HDR Mode, may not match user preference often they appear too dark, occasionally too bright, but this can easily be adjusted to the desired brightness level by the end user by using a simple brightness slider control in the Display Settings panel in Windows. The transition from SDR->HDR mode often leaves the user wondering why HDR is less saturated, often this is because SDR is incorrectly over saturated, stretching the Windows SDR color to the display’s maximum color range. HDR, by contrast utilizes the full color range, but for the majority of SDR applications which are designed to only use the sRGB color gamut, these images will become constrained to sRGB rather than the display’s full range, and thus look de-saturated versus their appearance in SDR mode.
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