New Tools for neutrality

[Drapeau-Graphic]

Hello,

I’m working on catalogs which features object pictures on a grey gradient CMYK background. Our background generally aren’t neutral and have a dominant color.
Id like to implement a tool into my information panel which would allow me to know if the spot where I put my color picker is neutral or has a cyan, magenta or yellow tone. Also maybe try to find a function allowing me to neutralize an entire layer (I sometimes receive pictures where there’s magenta on the right and cyan on the left...)
When I say “neutral” I mean CMYK neutral background, not converted into grey scale.

[c.pfaffenbichler]

»Id like to implement a tool into my information panel which would allow me to know if the spot where I put my color picker is neutral or has a cyan, magenta or yellow tone.«

See the Info Panel’s Panel Options and set the Modes accordingly. 

[Drapeau-Graphic]

Thanks but I don't see the connection

[Drapeau-Graphic]

anyway i need the CMYK and total inking values

[c.pfaffenbichler]

»Also maybe try to find a function allowing me to neutralize an entire layer«

Have you tried Hue/Saturation Layers? 

[Drapeau-Graphic]

Thank you, actually I use the desaturation but if I completely desaturate it becomes magenta, so I have to find the right middle, it's tedious.

[D Fosse]

CMYK gray isn't neutral in the sense that C=M=Y. Inks have different densities, so that there is usually a higher percentage of cyan ink (and a little lower percentage of yellow).

Furthermore, the ratio isn't exactly the same in different CMYK profiles (because they correspond to different ink specs). So a formula would have to be profile-specific.

[c.pfaffenbichler]

Setting the Color Sampler Readouts to Lab (or maybe HSB) might provide a food clue about how »neutral« a color is. 

[D Fosse]

Yes. Lab readout will work.

[Drapeau-Graphic]

If in a new CMYK file, fill in I use values ​​T = 0 S = 0 L = x photoshop will fill me the layer with a neutral gray with variable values ​​depending on X.
I cannot memorize all CMYK values ​​that are neutral gray.
Once again I am not trying to get around this problem but it seems to me that there is a lack of a tool allowing to know where we are at the level of neutrality that was the goal of my post.
All the more so in times of Covit / telework where people do not always have access to a calibrated screen to work.
How to send the info back to the developers to claim a missing function?

[Drapeau-Graphic]

I know how to make a background neutral but it is painful on a daily basis.
I wanted the implementation of a function or tool that I miss in my job, maybe I didn't post in the right place.

[c.pfaffenbichler]

»maybe I didn't post in the right place.«

The place for Photoshop Feature Requests is 

Photoshop Family

But frankly I don’t think you have exhausted existing possibilities. 

And why are you working in CMYK anyway? Is the imagery illustrative or photographic? 

»I cannot memorize all CMYK values ​​that are neutral gray.«

What are you talking about memorizing values? 

If a and b in a Lab readout are 0 (or thereabouts) then the color is neutral.