Lightroom: Targeted HSL Saturation adjustment moves wrong slider

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  • Problem
  • Updated 2 months ago
  • Acknowledged
  • (Edited)
When I use the targeted HSL Saturation tool to select a color, the Magenta slider gets highlighted, but as I move the cursor, it's the Red slider that does most of the moving. Then the undo bezel shows "Magenta" as getting undone (even though the changes to Red get undone also).  Here's a screen recording:

https://www.dropbox.com/s/kvnxhcs0v0iehda/lightroom-hsl.2018.08.29.mov?dl=0

Tested in LR 7.5 / Macos 10.13.6..
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John R. Ellis, Champion

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Posted 2 months ago

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John R. Ellis, Champion

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Oops, added category.
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Todd Shaner, Champion

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I can confirm this behavior on my Windows 7 system using LR 7.5 with what appears to be Magenta colored objects in some pictures. However, if I use the HSL targeted adjustment tool (TAT) on a raw file shot of a ColorChecker Passport  it behaves as expected. The Magenta patch moves only the Magenta and nearby Purple sliders and the Red patch moves only the Red and nearby Orange sliders.

Regardless of that observation it still appears to be a bug. If I manually move the Magenta Saturation slider on a Magenta area it behaves as expected. If I use the TAT pointer on the same area it has much less affect on the saturation and obviously targets the wrong color.
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Rikk Flohr, Official Rep

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Looking at this, do you think it is simply the highlight is marking the wrong color range or is it actually adjusting the wrong color range? Without being able to directly interrogate your colors it is hard to tell from the video.
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John R. Ellis, Champion

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The actual color adjustment to the image made by the adjustment tool corresponds with what I'd get by manually changing the Red slider the same amount.  But it's more than just highlighting the wrong slider (Magenta) -- it's also adding the wrong item to History.

Here's one of several pics in which I observed the problem (same species of flowers, different times of day and different light):
https://www.dropbox.com/s/uv1hfh32br2h8yp/magenta-bug.2018.09.04.arw?dl=0

I'm using the HSL Saturation adjustment tool on this flower:



Here's a screen recording of exactly where I click and what happens:
https://www.dropbox.com/s/nn5wvtdle6ji4dq/magenta-bug.2018.09.04.mov?dl=0

Note that the Magenta slider is highlighted but it's the Red slider that shifts to +64, while Magenta goes +5.  And History shows just "Magenta Saturation Shift +5", with no Red shift.


(Edited)
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Rikk Flohr, Official Rep

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Are all of the examples where you've observed this involving Red and Magenta?

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John R. Ellis, Champion

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Yes. But I wasn't doing any other colors.  
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Rikk Flohr, Official Rep

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I suspect not based upon the 360 - 0 degree transition in the H of the color wheel between Magenta and Red but that is just my inkling. I will put the issue to the team as such. 
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Todd Shaner, Champion

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Rikk, I tried it with every color in the HSL panel using the below image. Only the Magenta color stripe exhibits this behavior (i.e. targets the wrong color Red). The Hue, Saturation, and Luminance TAT pointer all exhibit the same issue with Magenta color objects.As John mentions the Magenta slider is highlighted, but the Red slider moves much further than the Magenta slider. This is not normal behavior. Also the TAT pointer has less affect on the Magenta object than when using the Magenta slider directly.