"Correciting a correction" reduces bit depth and the number of available colors. Not a preferred method, except in small amounts.

Use a different LUT, or use traditional grading, but try not to stack corrections if possible.

Don't know what you are all doing but long time ago I used the NB FX "Skin TouchUp"

@marcinzm - I agree totally with @Dexcon. I wanted to add the following if you haven't yet considered it 😉.

If you are attempting to adjust Skin Tones to a moving Subject, then you need to have a way to attach that adjustment to the movement of that moving Subject. Now, you can either restrict those STs within a Mask: Color Correction (Secondary); NewBlueFX's ColorFast 2, or the other one which @Dexcon mentions, BorisFX's Beauty Studio (as a Premium Filter or within the Image Restoration Unit.

It is all going to come down to how much movement there will be with the Subject and/or how deep your pockets are.

Correcting a correction" reduces bit depth and the number of available colors. 

Yes. Sometimes using multiple color grading FX can result in abundantly obvious poor results. Sometimes, changing the order of the FX in the FX chain can improve things a bit.

Looking at NewBlueFX's TotalFX 7, Skin TouchUp is still a current FX.

Thank you all for replies.

1)

What about the case when there is a group of people, a few of them have little yellow skin tones and few of them have much yellow skin tones.
What plugin would be the best?
2)

What about the case when I have 2 hours long wedding video and I must apply such plugin to correct skin tones? What plugin would you recommend me in that case? I think that it should correct skin tones automatically, because manual correcting would take much time for such a long video.

Thank you in advance for you next replies

Regards

Or...

Can I import a LUT file to color grading panel and decrease yellow saturation in color grading palenl and finally export a LUT to LUT file and then final LUT would be my final preset.

Is it possible to do in Vegas Pro 19?

What about the case when there is a group of people, a few of them have little yellow skin tones and few of them have much yellow skin tones.

Is this before or after the LUT ('after' seems to be the case from your original post)? If this is after the LUT is added, get rid of the LUT and try another LUT - or color grade using other options available in Vegas Pro at event, track or project level. Or create your own LUT in Vegas Pro that better meets your color grading requirements without the yellowing.

https://www.vegascreativesoftware.com/us/video-editing/what-are-and-how-use-luts-in-color-grading/

If you're run and gun while filming, it's a bit hard to maintain the skin tone color across the board. Even with plugin you still need to manually adjust the parameters.

Secondary corrector OFX is the most ideal plugin to use for correction specific color range:

I hoping the Secondary Corrector get an "overhaul" so that it can perform better like the other NLE's secondary corrector (Premiere or Resolve) which offer Denoising settings to smoothen the color selection. Having it in GCP panel would be cool tho cuz I personally used it alot.

Another method you can try is to adjust the hue. Unfortunately VP does not have any plugin or tool that can independently correct a specific hue. However, you can download free AAV plugin which allow you to adjust primaries and secondary color manually:

http://aav6cc.blogspot.com/

If you're serious in correcting the colors, consider buying NB plugins

@marcinzm - Just another "spanner" I need to throw into the mix: The Lighting. Natural lighting, you've got a good chance. But, the most worrisome is gonna be certain, LED, artificial lighting that will actually produce spectrogram GAPS in the waveform. Gaps mean that no amount of correction will help, there just ain't enough data to adjust. Let's hope, hey?

If you could post a BEFORE I'd like to have a shot at it - 😉.

Without seeing the before and after shots, we would have to take the OP's statement that it is "only" the flesh tones that are off-axis. If that is the case, then the original image (lighting), the LUT, or both are suspect.

It is more likely that there is an overall shift on the CGY axis that is more evident in the flesh tones, but without the OP providing samples, I guess it can be anything we want it to be...

I will post you an image BEFORE and AFTER applying LUT. I will paste it in 4 hours.

I know that yellow skin tones produces a LUT file.

Can you recommend me some bunch of LUT files which would be the best for wedding shots in a church and wedding party? even if they are paid.

For accurate color, try Leeming LUT if you use a supported camera.

@RogerS

I have Sony Alpha III camera and Gopro Hero 9 & 10 Black video camera.

Is it worth purchasing from Leeming LUT when I don`t have log footage?

I use Sony cameras (including the a6600) with Cine 2 myself. It saves time getting you to accurate color and removes the oddities Sony color has. I find it is a good timesaver.

For GoPro I haven't used that LUT myself- you do have to follow the instructions in the PDF on the website. If you get the settings right it should look good with the LUT and should match the Sony fairly well post-LUT.

I use Sony cameras (including the a6600) with Cine 2 myself. It saves time getting you to accurate color and removes the oddities Sony color has. I find it is a good timesaver.

For GoPro I haven't used that LUT myself- you do have to follow the instructions in the PDF on the website. If you get the settings right it should look good with the LUT and should match the Sony fairly well post-LUT.

Agreed, I have both Leeming LUTs, for Sony and GoPro Hero 8. As per Leeming instructions for GoPro Native, you need to adjust white balance before applying the LUT. However, I find that I often need to manually adjust the black point and exposure, GoPro if often fairly off.

Sometimes using multiple color grading FX can result in abundantly obvious poor results.

For me the attraction of secondary is that it allows creation of a mask that only targets objects that I think can be improved. Not unusual to use as many as 6 or more on non-overlapping areas. But I wouldn't start with a look lut... I always start with a camera to rec709 lut and would only choose a look lut last. And only if it's beneficial overall without further adjustment to specific areas.