It may not be the same and I am not that familiar with LR but this looks like it lets you tweak the RGB primaries of the color profile used. You could try the Color Lut module and tweak the r g and b primary patches there and see if you can get close to what you want to do… I think this is the only module with sliders organized in a similar way…other wise you will have to use some masking and multiple instances of other modules like CB
1 Like
If you want to try out the masking/Color Balance approach @priort is referring to, this might help you: Color Balance RBG: select by hue presets - nice thing about it: you can download some presets with hue masks already baked in 
3 Likes
Thanks, I was thinking of that post but couldn’t remember where is was…
1 Like
If you post the raw with proper attributions in play raw, others will post their darktable approach to the image (eg. What modules they used).
that white triangle on the right side looks horrible in the edited copy
2 Likes
LR is closed source program and no one knows what it does internally, so you won’t be able to replicate the same effect the same way as the lr color calibration does.
In darktable there is also way how to modify primary colors - it’s the channel mixer part of the color calibration module (RGB tabs).
https://docs.darktable.org/usermanual/3.8/en/module-reference/processing-modules/color-calibration/
You may need to find own way to achieve similar results.
If you are looking for free software which has the same controls for primaries as LR, there is channel mixer in ART. Just don’t expect the same results.
https://discuss.pixls.us/t/rgb-primary-corrections
2 Likes
The module is called “color look up table” and you can find it by searching in the search box above the modules. It might not be visible by default if you don’t have all the modules activated.
Color lookup table…just search using the word color in the module search and it will come up
Hi! For the saturation part of LR’s camera calibration you can use the colorfulness tab in the color calibration module.
For the hue it’s a bit more cumbersome. Create three instances of color balance RGB. Set each of them to use a uniform mask, and set the blend mode to the red, green and blue channels respectively. Then adjust the hue slider to your liking. Mind you that each channel’s effect might be different than in LR, for example the red channel in darktable might do what the blue does in LR.
Hope it helps
2 Likes
Thank you very much for the reply! I’m finding it difficult to execute.
On the “color calibration” module should I only use the colorfulness tab , or the R,G,B as well?
On the “color balance RGB”, after creating the mask, should i navigate in the “master” subtab, and then use the “hue shift”?
Indeed it’s very hard to see the results I could easily get on Lightroom. I wish there was an easier way
Could you explain how you got the result in Lightroom approximately? Like what steps you took to get it? I don’t have too much experience with Lightroom but if you could explain what you do and how each step changes the shot, maybe I could replicate the result in darktable…
This is a decent demonstration of it…globally changing red green and blue…these things are often baked into an icc profile or in a channel mixer or some module that lets you select the primary colors to be altered… How The Calibration Tool In Lightroom REALLY Works (And How It Will Change Your Editing Forever) - YouTube I tried CB
Just use the sliders on the colorfulness tab. They increase or decrease the colorfulness of each of the three channels individually, similar to what the saturation slider does in LR’s camera calibration.
For the hue I told you it was a bit trickier. Sometimes a picture is worth a thousand words:
On the right panel, I’ve created three instances of the color balance rgb module, renamed each one accordingly, set the mask to uniform (below the module, that circle that is highlighted), and adjusted the blend mode to the appropriate color channel. Once that’s done you just need to adjust the hue shift slider to your liking.
If you are going for a bit of a “teal-orange” look, you just need one instance of the module, set to the red channel, and move the hue slider slightly to the left.
Hope that helps
1 Like
Does someone has a good understanding of the channel mixer in RT ? I can get nice results by pushing a slider up and then compensating with another one but I don’t really know how to get to a specific result. What does the inner/outer colors indicate ? If I want to do teal & orange what would be the logic being pushing such and such sliders ?
An example where I somehow stretched the color spectrum in the blue-red direction, I’m liking the result :
1 Like
I thought the same and tried it last night on a colorchecker image but I dont’ feel like it works like the LR hue changes… in LR moving the red slider creates a nice deep orange and I could not get that effect on the color checker blending to the red channel and rotating hue…I don’t have LR to check though…I think there are similar sliders in the Adobe Profile editor… I might look but that’s off topic
It probably won’t achieve exactly the same effect, but it is as close to it as I know how inside darktable. That said, two thoughts:
Lightroom’s hue slider is restricted. With the red slider you can go towards magenta, or towards orange, for example. In colorbalance RGB you can rotate the hue 360°. That means that small changes have a big effect. If you want finer control, adjust the opacity of the module.
The three channels do different things between programs. To achieve the teal and orange look wirh LR’s camera calibration, you need to tweak the blue channel, and in darktable it is the red one.
2 Likes
Actually, I think the colors in your example are quite unnatural. This is what I get with a quick & dirty edit of your first JPG with the modules “color calibration”, “tone equalize” and “color balance rgb” in darktable.
A7305857.jpg.xmp (4.9 KB)
2 Likes
Thank you @anon16817310 ! I’ve been trying hard to replicate the effect, it’s closer but it’s hard, a lot of sliders to move around, and the RGB Module with that mask isn’t replicable for other photos, I would have to create it each time I want to do a similar edit… Even creating a style and copying it can have undesired effects because I believe it builds on top of whats in the photo.