AutoCAD Map 3D :: Color Values Cmyk To 256
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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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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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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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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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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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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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 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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Apr 24, 2012
There is a BLOCKA that I'd like to extract its attributes - Tag and Color - into an external format (excel). There after, I'd like to import it into the drawing and based on its color attribute value, change the value to that color in the drawing.
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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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Apr 18, 2013
Is there a way to have no layer value set for the description keys. I set all the layers, and now I realize I'd rather set this to no layers (boxes are all unchecked). I'd rather see no value under the layer column, but there doesn't seem like a way to set this.
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May 18, 2012
As long as a cmm is set up it is not possible to me to measure the same color value on screen (with an external color picker) that I entered in Corel's color definitions. This only works, when I turn off any cmm in Draw.
Plus it is not possilbe to export a pdf in which I can measue the RGB values that I defined in Draw. The closest I get is without a cmm (see above) but I still get readings that are off by 1 in most cases (I don't figure why rounding issues should be acceptable here).
The only export that works for me is to export for "Office" .. only then all values are exactly how I had defined them.
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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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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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Jun 5, 2013
If there is a way to make Outline Same as Fill - is there a way to Transfer color values from object to another?
Select object you want to change THEN select object with color you want - hit button and it transfers?
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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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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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Jun 17, 2011
what the technique is called when you swap the values of two of the colors within a selection?
For example, let's say that we have a nice pinkish color for something... but you don't want pinkish. This would keep things looking relatively nice, simply by swapping all the red values with the blue values, giving you nice lavender-ish color instead. Or perhaps swapping blue with green values, giving you a more orange-y color.
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Feb 12, 2013
I've been placing photoshop tiff files into Illustrator, and doing this seems to change the color values, when I sample them with the eyedropper tool. The images I made use a custom mix of CMYK rich black, with the K set to 100. In Illustrator, they appear to revert to the default 'Photoshop black", approx C75 M68 Y67 K90. This is not my intent of C70 M60 Y58 K100. The Illustrator document is CMYK mode, and I don't know why this is happening. The non-image items (vectors) in my illustrator file DO retain the color values I intended, however.
Is this some kind of setting I can change in Illustrator? Will this discrepancy show up when this file goes to print?
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Feb 26, 2013
I have some c# code (though it could be any language) and I am trying to copy the colors used therein into an Illustrator design.
Here's the code:
private static readonly Dictionary<string, SolidColorBrush> _DefaultModeColours = new Dictionary<string, SolidColorBrush>
{
[Code]....
The colors are specified using hexadecimal numbers for the ARGB values.
In Illustrator I have the following color chooser:
I could fire up a calculator and convert each of the (nonobvious) hex values into decimal, but I imagine there is an easy way to change the Illustrator settings for the document to use hex values. Is there? If so where do I set it?
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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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