Identifying stamp color

I am curious if a TSF member has this software.
My operating system is XP and it does not meet the requirements.
It would be very useful for me to measure the shade difference of one stamp (from a sheet) compared to another shade of the same stamp in a block of 4.
With the naked eye, I notice that there are different shades, but I still haven't been able to determine if they are the 2 shades from the catalog or just one shade.




First row, there are 2 expertised stamps (not mine) with the 2 "sienna" color shades from the catalog .
On rows 2 and 3 are my stamps photographed with my phone in different light conditions.
It is clear that the colors look very different.
If the software is that good, then the difference in shade between the 2 stamps on row 2 should be the same as the difference between the 2 stamps (same stamps) on row 3.
It is recommended that the sampling be from the area of the brick in the bear's paws (the color is uniformly deposited)
The difference in shade between the 2 expertised stamps on the first row must also be measured.
If the value of the difference is close to the 2 values established for rows 2 and 3, then I can say that I have a sheet of stamps worth 20,000 Euros. (this, of course, after I send it for certification)
I hope that the google translation will be understandable and someone will help me.

As a Linux Ubuntu OS user, alas, I can offer no suggestions for getting the software to work, but do encourage continued efforts as the software itself is a useful addition to the philatelic tool kit.

Hi tobben63
Please help me (due to system software I can't download the PERFOMaster4000 software)
I don't know if the color sienna is in the color list of the application and I don't know if you can compare the colors of the stamps only with the colors in the reference list.
I am not interested in identifying the color, but only in establishing the color difference between the 2 stamps and the difference between the two samples in the catalog.
Is what I want possible? Can you make these measurements?
Thank you.
George

I just wanted to mention that I did receive a response to my question posed to the software developer:
Now I will need to take the next steps to give it a try.  I am looking forward to using it and seeing where it leads me.

Stay colorfully stampy, all!

Thank you stanley64 for taking the time to help me.
It is wonderful that there are members who are willing to help with their time and information/knowledge.
The results confused me a little, because the difference between the 2 stamps on rows 2 and 3 should have been almost identical.

row 2 _ stamp 3 (11.43) – stamp 4 (6.29) = 5.14
row 3 _ stamp 5 (13.93) - stamp 6 (6.00) = 7.93

I checked the pictures again and I made a mistake: stamp 3 and 5 on row 2 and 3 do not come from the same block of 4.
I think this is where the difference of almost 3 units at Delta E comes from (accepted in your previous analysis as possibly due to storage/archiving conditions, the paper being of the same type).
stanley64, please help me with the color difference (compared to the same sienna reference color) for the expertized stamps from row 1.
If the result is the expected one (from 5.14 to 7.93), this will convince me to send 2 stamps from the sheet for expertise.
Thank you
George

Yes indeed, JeffS, that is exactly where I am hoping to head with this.

It will take some time before I am ready to do that, as I am still travelling at the moment.  I am hoping to start working on this in earnest in early November after I have made my relocation back to the US.

You identify the color with the stamp and the Color Guide in front of your eyes.
If you read my previous post, you will see the 2 stamps with different shades of sienna color, next to the shades in the catalog.
Having the 2 shades on 2 certified stamps already (see another post of mine), I try to check that the difference in shade between my stamps is the same as on the certified stamps.
If you see how I calculated (the difference of the differences), then I think that this eliminates the error of setting the conditions for scanning / photographing the pairs of stamps.
It looks very different on the monitor, but by calculating the difference of the differences, I should get the same values (in the happy case that my stamps are the 2 shades from the catalog)
The condition is that they are scanned/photographed together and that they are shades of the same color.
I don't know how I will proceed with combined colors.

Sorry stanley64 for the late reply.
It's dinner time for me.
I didn't understand if you compared the two stamps or not with the reference color "Sienna_0" (excuse my rudimentary English)
Thank you very much for the effort and tomorrow I may be able to translate and present the introduction from the Michel Color Guide.
Greetings
George

Hi
I am also to many members an ignoramus in color theory.
I only have the Michel Color Guide (MCG) and I cannot make a comparison with the other color catalogs.
I present to you some images from the MCG introduction where I found some explanations that helped me a lot (compensating for my poor ability to appreciate colors – not everyone has a painter's eye)
1. Factors influencing color determination:











2. The light conditions in which a more accurate determination can be made:




In the MCG, only 5 shades are represented from the scale of 10 shades presented previously. (it is explained how to interpret the missing shades)

3. MCG tries to achieve international communication in this field by using the 3-digit code under each shade and explains what each digit represents.
It should not be forgotten that in the name of German colors, the last of the name is the base color.




4. The elimination of ambiguous color names and the intention to double the number of color charts in the future.





5. Translation of the introduction and words from the scale of shades in English, French, Spanish and Italian.
I have only taken over the English translation:
matte = matte
hell = light
mittel = medium
lebhaft = striking
dunkel = dark
schwarzlich = blackish

Good question Stan (stainlessb ); I too found the pre-loaded colour chips somewhat limited. To augment the existing colour table in the software, one can use the option "Save selected color in color table".

Alas Stan (stainlessb ), as you have found, it is one colour at a time.
Ideally, the current colour charts from the known publishers e.g. Stanley Gibbons, Morris, etc., would be made available in electronic form and could be imported into such an application like PERFOMaster4000.

It is the season for wishes...


Have fun and happy collecting!

I have accepted this and have started scanning and adding- naming the colors based on source and including in some cases the country of the stamp i grabbed the color from 

basically, I can make up names withtyhe best of them LOL

I mention once again that the previous images are taken with a mobile phone (I took several images until what appears on the monitor resembles samples from the Michel Color Guide - MCG)
What I posted as a "prussianblue" sample cannot be taken as a reference (R,G,B) but only to give you an impression of how this color looks.
I found on the "stampsx" website an image with the 3 colors of the Baden, Michel 10 stamp on which I collated my image with "prussianblue":
1 – lebhaftpreussischblau
2 – mittelultramarin bis ultramarin
3 – lebhaft bis dunkelviolettultramarin




The images on "stampsx" are generally very close to MCG colors because there are instructions/recommendations about using/setting up scanners and scanning software.
I have seen different color images of the same stamp due to the use of different scanners and software.
So in the end only the eye of the collector can distinguish if what he sees on the monitor corresponds to the colors in the color catalogs - this is my opinion.