For quite a long time have I wanted to achieve a look similar to my Fujifilm bodies’ Classic Chrome simulation. Later when the RGB Primaries module made its arrival to Darktable, I was obsessed with colour grading just within this one module.
Well, I think I’ve got it and want to share.
primaries_Michal Chrome.dtpreset (1.1 KB)
Works best with daylight whitebalancing.
Looks spot on. I’d say it lacks a tiny bit of saturation but besides that it “feels” like Classic Chrome. Thanks for sharing 
You can use these LUT files in the Lut 3D module to achieve similiar look:
Fuji_classic_Chrome_LUT.zip (3.0 MB)
I tried editing your JPEG and it looks pretty similar. The advantage of LUTs is that they should work consistently across all lighting situations.
I think there is also a preset in the color LUT module or maybe it was CC… …not on my PC but I feel like there were at least 3 main one’s Provia, Velvia and Classic Chrome or maybe it was Astia??
Ya I thought so and as for the LUTs there are so so many Fuji LUTS out there…some better than others I imagine… and the 3DLUT module should be tweaked to match the expected colorspace of the LUT if it is know … so that the results are what they are supposed to be…
I got these LUTs from the RawPedia (which is still down at the time of writing):
http://rawpedia.rawtherapee.com/Film_Simulation#RawTherapee_Film_Simulation_Collection
This is the related thread:
I’d post the ZIP of all LUTs here if anyone wants it now, but it’s 402MB 
Can we come back on topic please, which is this preset that’s been shared here with us?
I must apologise in advance, as it is possible I cannot express my thoughts in English properly.
But to the point.
I’m not to crazy about LUTs. I have tried plenty, and I feel they cut and split the colours into finite X-number of segments, then force one colour to be another. Under certain circumstances I got artifacts, strange tonal gradations, banding, previously adjacent colours suddenly being drastically different and so on.
And while the new Color Equalizer is also a nice tool and I sparingly use it from time to time, it has to calculate internal masks (I believe) to isolate particular colours.
I’m huge fan of RGB Primaries because it operates on pure RGB channel mixing, just swinging proportions - no masks calculation needed, perfect, smooth and fluent blending. Also helps with strongly saturated colours early in the pixelpipe.
That’s how I understand all of this and it’s my fad / quirk 
@paperdigits Just quick “Thank you” to everyone for feedback and I don’t go loquacious anymore. Sorry!
Thanks for sharing your use of color primaries module. I am yet to fully embrace it and you have demonstrated a good use for it. I like that you included a screen shot so we can recreate it easily if we like.
BTW, you mentioned the color equalizer module, I also still use the color zones module. They are very similar yet I don’t feel the color equalizer has done away with color zones for me. In color zones you can set within reason as many nodes as you like.
@Leniwiec thanks for that! I tried it on one of the images from a trip to Paris I did in September and it looks real nice. I’ll have to compare it with some jpegs with classic chrome I have back from my Fuji days, but I’m looking at this one image from my daughter jumping down from something and it’s fantastic with this preset applied (I copied rgb primaries, sigmoid and the light tone equalizer idea).
I’m glad you like it!
You may of course add / remove some vibrance or saturation in Colour Balance RGB to your own taste - many Fujifilm Recipes found on the Internet modify these to achieve a specific look.
