Which output colorspace did my TIFF file really get?

Software darktable
2

Have you checked the output file directly? I am on Linux Debian. I do this:

exiftool -icc_profile:* <filename.ext>

Example output for 16-bit TIF:

$ exiftool -icc_profile:* 0Y8A7359_01_g.tif
Profile CMM Type                : Little CMS
Profile Version                 : 4.3.0
Profile Class                   : Display Device Profile
Color Space Data                : RGB
Profile Connection Space        : XYZ
Profile Date Time               : 2018:11:13 11:18:01
Profile File Signature          : acsp
Primary Platform                : Apple Computer Inc.
CMM Flags                       : Not Embedded, Independent
Device Manufacturer             : 
Device Model                    : 
Device Attributes               : Reflective, Glossy, Positive, Color
Rendering Intent                : Perceptual
Connection Space Illuminant     : 0.9642 1 0.82491
Profile Creator                 : Little CMS
Profile ID                      : 0
Profile Description             : RTv4_Large
Profile Copyright               : Copyright RawTherapee 2018, CC0
Media White Point               : 0.9642 1 0.82491
Chromatic Adaptation            : 0.99995 -3e-05 -3e-05 -5e-05 1.00005 -2e-05 -2e-05 2e-05 0.99974
Red Matrix Column               : 0.79771 0.28806 0
Blue Matrix Column              : 0.03133 8e-05 0.82489
Green Matrix Column             : 0.13516 0.71187 2e-05
Red Tone Reproduction Curve     : (Binary data 40 bytes, use -b option to extract)
Green Tone Reproduction Curve   : (Binary data 40 bytes, use -b option to extract)
Blue Tone Reproduction Curve    : (Binary data 40 bytes, use -b option to extract)
Chromaticity Channels           : 3
Chromaticity Colorant           : Unknown (0)
Chromaticity Channel 1          : 0.7347 0.2653
Chromaticity Channel 2          : 0.15961 0.84039
Chromaticity Channel 3          : 0.03661 0.00011
Device Mfg Desc                 : RawTherapee

In my case: Profile Description : RTv4_Large

(I use Adobe ProPhoto output color profile RTv4_Large. but that is just this particular file).

I also use Darktable, but RawTherpaee Wiki has a page where different methods to examine embedded color profile in a picture file output: How to extract and examine ICC profiles - RawPedia

EDIT: Darkroom → Output color profile → export profile is just a default setting for file export for the Output color profile module. It does not state which embedded color profile a tif or jpg file has.

EDIT: Darkroom → Export → profile → image settings means that the profile set in Darkroom → Output color profile will be used, but this can be overridden.

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