Photoshop :: CMYK Color Values Change Unexpectedly
Jul 16, 2013
I'm working in Photoshop CS 5.5 on a Mac, and I want to apply a specific CMYK color to a selection in an image. I create the color with the values C=0, M=100, Y=100, K=10 and add it to my color swatches. Then I select the section of the image where I want to apply the new color and fill it with the paint bucket. The color fills the section just fine and life is good. But then when I roll over the section with the eyedropper to double-check the CMYK values in the Info window, it shows that they've inexplicably shifted to C=9, M=100, Y=100, K=1.
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Jan 18, 2014
I've had this problem before, and it randomly popped up again today.
This time restarting Ai fixed the issue the first time. I just don't know if this was human-error/setting on my end, or a minor bug to report.
So I create a CMYK Ai doc. Create some black text and/or shapes. Then decide to change color to rich black by manually entering CMYK values (in this case, 60, 40, 40, 90), select ok. However, the colors revert back to original percentages (75, 68, 67, 90).
In past versions, it's happened once or twice, and restarting Ai didn't solve the first time.
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Apr 15, 2013
why change the CMYK values of a color when converting to spot color in a color chart
xmp C 0 M 90 Y 100 K 0
to C0 M 87 Y 89 K 0
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Feb 13, 2013
I have a photo of an object on a black background, and during the editing process the cmyk values of the black background are c=75 m=68 y=67 k=90. As this image is to be placed on a business card, if it is possible to change the values to 100% K or 40% C 100 %.
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Jun 19, 2013
I have a file from a client that has a table with the color values recorded as CMYK. (e.g. 50, 0, 10, 0)
I'd like to display the colors but I can only figure out how to do it if it's in the 256 color format. Is there a way for me to convert CMYK color values to a 256 color value. I realize the hues/colors won't be perfect, and I'll be happy with colors close to what the original data was using. Maybe there's a way to go from CMYK to RGB, and then to 246?
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May 10, 2011
Having an issue with CMYK 100%-K value getting reconfigured on PDF/X-3: 2003 (ISO 15930-6) CMYK Export to values like:
C - 74.06%
M - 68.29%
Y - 66.57%
K - 89.83%
When working in the xar file, the CMYK for black is:
C - 0%
M - 0%
Y - 0%
K - 100%
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Feb 19, 2012
Via VBA macro, some way of getting RGB/CMYK color values of a bitmap pixel by pixel?
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Jul 3, 2013
I need to change my greyscale color settings to CMYK black, where in CC do I find the profiles to load?
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Aug 4, 2013
PhotoShop CS5.5: I'm trying to change the color black in a simple, scanned logo to green. I can't get the fill to accept the CMYK formula.
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Oct 22, 2012
A few months ago I made the switch from X3 to X6. I use Corel for lasering, and need a RGB red hairline for the vector cutting. All of my old files were done this way, but for some reason when they are opened in X6, they are opening with a CMYK red hairline, which does not cut on my laser.
Is there a way to get this to change automatically on old files, or do I just have to do it manually as I need them? I have thousands of files, and I seem to forget to change this sometimes.
I do have it set for RGB to be my default now, so anything new I create isn't a problem -- just the old files.
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Dec 4, 2013
I have a plain rectangle with overall c09300c0 RGBA levels.I want to change the alpha channel value from c0 (193) to some other value, for the whole image at once. Or some other color channel.
How can I change the absolute value of a channel ? The color menu has only relative adjustments.
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Nov 30, 2012
I have a client who asked for a SPECIFIC shade of blue which happens to be 100,70,0,0. Now I know my screen will never show the exact color, always shows lighter. This part is ok. But I go and change the values on the color picker, and then 10 minutes later when I come back to it, the values changed to 95,65,1,0. Why would this happen, it KEEPS happening and not just one one color, on ALL OF THEM, it just changes the numbers slightly fromw hat I put in.
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Apr 14, 2008
I have line drawings in a layout that I scanned in. I'd like them to be the same or close to the black cmyk value of the text in the document. I'm not sure how to accomplish this. I tried channel adjustment and replace color,
putting in the specific value I wanted (I read that c50 m40 y40 k100 was a good black for print), but nothing seems to work correctly. I would like to keep some kind of greyscale value (not make everything black), but I want the darkest shade to be that specific cmyk value. How do I do this?
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Jun 6, 2013
Is there a way to export a document @ a different resolution than 72DPI? I know I can set the horizontal/vertical scale to save it at a larger dimension at 72DPI, but I need the file to be actual size and 300DPI.
This is part of a larger process, and I'd prefer to do the entire process from Illustrator, and not have to open the files in Photoshop to change the size/resolution.
Also, is it possible to change the color mode to CMYK or Greyscale for the exported Jpeg?
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Dec 19, 2012
When placing a .psd file with a spot channel into illustrator, and then later copying this and pasting back into Photoshop the color shifts.
Original Photoshop spot color channel (0/100/81/16)
Color after pasting back into Photoshop (13/99/88/4)
We are making renders of packaging, so the designs are from illustrator. We correct this by removing the Photoshop spot channel and recreating this as a CMYK layer, but looking to avoid this step as we do many many renders. Even with assign color profile set to none this happens.
Viewing Photoshop channels you can see a difference in values between the linked image and illustrator flat tint.
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Jul 18, 2013
I have an attribute blocks and this att block has two tag values , is there a simple code for to change 1st tag values automaticly according to 2nd values ?
for example :
1st tag (50x50) - 2nd tag ( 100 ) ==> 50x50-100
if i enter 201 valuse to 2nd tag then 1 st tag has to change as 100x100
if i enter 501 valuse to 2nd tag then 1 st tag has to change as 150x510
I attached a jpg file for explain much better
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Mar 26, 2013
I want a script that can convert RGB value to CMYK values.
I've seen this thread which explains a script to round up and down:
[URL].....
but is there a script that i can actually define lets say the colour is yellow and in RGB it looks ok because its in RGB mode so you change it to CMYK and you have 6% - 9% cyan and you only want yellow
is there a script out there that i can say
if
cyan = 6%
yellow = 80%
magenta = 0%
black = 0%
then change to
cyan = 0%
yellow = 80&
mangenta = 0%
black = 0%
I don't mind writting the code for each colour that needs to be converted as it would only need defining once but how would i make this script?
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Jul 2, 2012
When I use a Pantone color in CS5 and then convert to process, I get certain values for CMYK. However, when I use that same Pantone color in CS6 and convert to process, I get different values for CMYK.
For example, Pantone 2685C converted to process in the both applications yields:
(CS5) C-96, M-100, Y-0, K-10
(CS6) C-90.73, M-100, Y-30.6, K-16.54
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Mar 10, 2014
I am struggling to understand why Illustrator is changing the values inside the RGB and CMYK boxes. I am also not sure of the exact relationship between these vaues. Essentially, it appears that if you set the Document Color Mode to RGB, it leaves the RGB values that you type in alone. If you set the Document Color Mode to CMYK, it leaves the CMYK values alone.
But as soon as you change the Color Mode, it automatically modifies the values. So if you were in RGB mode and you set some RGB values, it changes those RGB values when you switch to CMYK mode. And vice versa.
I had thought that the CMYK palette was a subset of the RGB palette. It would make sense to me if it did this when I switched from RGB to CMYK mode, but it doesn't make sense to me why it does this when I switch from CMYK to RGB mode.
The other thing I am confused about is the relationship of the values in the RGB boxes to the values in the CMYK boxes. I would have thought that the relationship between them would be static. Actually, it is not. When I am in CMYK mode and I enter a CMYK value of 90 16 0 0, the RGB values become 0 158 222. But when I switch over to RGB mode, the RGB values of 0 158 222 result in CMYK values of 75 23 0 0.
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Mar 24, 2013
I made a simple poster using photoshop to make the background and illustrator to make the fonts and some other stuff. In CMYK my black is just 100% K ( in photoshop)
When placing image in illustrator the 100% K (black) changes to different black with C M Y added. But then when I save it as PDF the preview shows black as a bit grey (which is something normal- in print it will be just black). So my question is .. should I change enything just to be able to see a 100% K in illustrator in order to match CMYK values of Photoshop? Or should I leave it this way? I guess if I am getting a "grey" in PDF preview is something good isn'it? because in photoshop when I set to 100%K in my screeen it looks like grey and not total black.
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Mar 21, 2012
The project is a photo montage. It was 4-color, now must become 2 colors. So I've changed each of the original 4-color photos (jpg and eps) into separate psd files (as grayscale/duotone/montage-and assigned it One pantone color)
In a new psd "montage" file, I plan to place each photo on its own layer, adjust tints, transparency, etc, to create one new montage/flattened.I'm not sure which color mode is best when setting up this new file, CMYK or grayscale?
Once the PS doc is done, the job will be saved as a PDF for 2-color printing.I want to insure the 2 pantone colors separate properly at press.
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Oct 17, 2007
i have always used a designer to come up flyer designs for events. They all go for commercial printing. Thing is when i try and design something in cmyk, the colours always go slightly dull, but yet when my designer does the design in cmyk the colours remain bright.
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Aug 25, 2013
I open my file (which has an embedded srgb color profile) in photoshop (my rgb values are 246/205/218). When I use the color picker, it confirms that my color is accurate. Then I save the file as a JPEG (using maximum-12, and baseline), also embedding the same srgb color profile into the photo (which is also my working space btw). Then when I reopen the JPEG file in photoshop, and use the color picker.... my srgb values are (246/205/219). The difference is so small that it doesn't make a huge difference, but why is this happening? My PSD file has of course maintained the original rgb values.
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Mar 1, 2013
I know RGB to CMYK color transformation may not exact. But how could it have so much difference?
I have a RGB = (28,97,255) want to transform into CMYK.
Which number should I use?
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Jun 8, 2012
I have a CMYK file.
In it I made a selection, and in this selection I may only have B&W values (means only real "black", no more Cyan, Magenta, Yellow).
My question:
How to interpretate CMYK colors/Values into real Black (K) color?
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Apr 20, 2006
if i can do CMYK color separation in photoshop?
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Mar 21, 2013
So I am measuring the 'red' 'green' and 'blue' values of a picture after I adjust the white balance with a grey card.. I notice that if I measure the colors from 'selected layer' they are different then if I select 'entire image' those are both different if i do not do any white balance adjustment..
Which is the correct measurement that I should record? I want the the white balance adjustment included.
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Jun 7, 2013
About color lab color correction, in those days i'm watching a lot of tutorials about cause i'm trying to understand this new to me subject in a better way.
While neutralizing color, correcting a photo in Lab by Curvas adj Layer, the default eye dropper values are:
Black- 0, Gray- 128, White- 255 RGB (0-54-100 Lab)
To prevent the possibility of out of gamma some tutorials suggest to change the above mentioned default values:
Black from 0 to 26 RGB (0-6 Lab), White from 255 to 243 RGB (0-96 Lab)
What about the middle eye dropper Gray? A few tutorials mention to chage the gray value too from 128 to 133 RGB (54-56Lab) while the majority never mention gray value, they tell about black and white never mentioning the gray value; what is your experience about?
The above mentioned "out of gamma problem" is mainly related to output printing or to screen displaying too?
Generally speaking I would like to receive some comment by you gurus about this very subject, while working in Lab, what about your Curvas adj Layer eye dropper values, do you change them or you leave them as default?
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Dec 22, 2008
Is there a way to select a portion of an image and display the average RGB or Lab values of that area? Right now I can only see the values of selected individual pixels. Instead of manually adding up these values to get the average value which is quite tedious, can someone help me to a better option?
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Oct 12, 2008
I have a selection or a layer of which I want to tweak the color. I use my color sampler to read the RGB values from my "source". How can I apply those values to my selection/layer ? If I use a color fill, I lose all detail in my original.
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Aug 4, 2008
Is there a way to select pixels in Photoshop based on given Lab values? I am using Select --> Color Range with a specified "fuzziness" threshold, but I'd rather make the selection based on specific Lab values instead of random pixels that I choose with my eye dropper. Is there a way to do this in Photoshop, or does anyone know of a plug-in that might do this?
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