color problems

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Fri, 29 July 2011 06:10 Go to next message
obrien1984 (Photoshop begginer)
Hello,

I'm not a graphic designer, nor do I have a deep knowledge of color
space, color profiles, or image rendering. However, I need to try to
help out a coworker who is running into some problems.

This coworker came to me the other day asking why the color of a logo
in a tiff was slightly different than the color of that same logo in a
PDF file. She is running Windows XP, but the files were created with
Photoshop and Acrobat on a Mac.

Additionally, she says that images saved in Photoshop on a Mac
typically look horrible on her PC -- the color is "off". She does not
have Photoshop, and is opening images for proofing with the native
Windows preview application. This problem occurs on every Windows XP
computer we have in the office.

Ideally, this person should be able to open images and documents
without there being a drastic shift in color. It doesn't have to be
perfect, but, for example, the color in the original image and one
saved in Photoshop should be pretty close when viewed side by side on
the same computer. I'm wondering if there is something that the
designers need to do when prepping files to make sure colors display
accurately on a PC?

Can anyone help point me in the right direction here?

Thanks.
Joseph
Fri, 29 July 2011 09:27 Go to previous messageGo to next message
Andrew Croft (Photoshop begginer)
In article
<50813f2f-e89f-4c7f-84d6-333267aa7cfd@k15g2000yqd.googlegroups.com>,
Joseph O'Brien <obrien1984@hotmail.com> wrote:

> Hello,
>
> I'm not a graphic designer, nor do I have a deep knowledge of color
> space, color profiles, or image rendering. However, I need to try to
> help out a coworker who is running into some problems.
>
> This coworker came to me the other day asking why the color of a logo
> in a tiff was slightly different than the color of that same logo in a
> PDF file. She is running Windows XP, but the files were created with
> Photoshop and Acrobat on a Mac.
>
> Additionally, she says that images saved in Photoshop on a Mac
> typically look horrible on her PC -- the color is "off". She does not
> have Photoshop, and is opening images for proofing with the native
> Windows preview application. This problem occurs on every Windows XP
> computer we have in the office.
>
> Ideally, this person should be able to open images and documents
> without there being a drastic shift in color. It doesn't have to be
> perfect, but, for example, the color in the original image and one
> saved in Photoshop should be pretty close when viewed side by side on
> the same computer. I'm wondering if there is something that the
> designers need to do when prepping files to make sure colors display
> accurately on a PC?
>
> Can anyone help point me in the right direction here?
>
> Thanks.
> Joseph

Hi Joseph,

The issue may have to do with using apps that aren't equipped to
display colour consistently - the Preview app she is using.

If the logo design in PhotoShop is in CMYK mode, no Preview app is
going to display the colour accurately because they, like Office apps,
only display colour in RGB mode. Sp there is a shift in the colour
immediately.

With a PDF there are options to generate proof-only PDFs which are RGB
content only as well as print-ready PDFs which force the colours to
CMYK mode if they aren't already in CMYK mode. So placing a CMYK image
in a PDF that is then saved in proof format means it will shift, and
having an RGB imagei in a PDF that is saved in print-ready CMYK mode -
shift again.

Also, depending on how the colour options were set up in PhotoShop, the
file itself may include a colour setting that affects the display of
colour and can be different from one device to another as the colour
profile attempts to adjust the colour for each device. The only way to
control this to some degree is to ensure you are using devices that are
meant for the job, and again Preview isn't one of them.

And, even after all of this, if you're looking at a CMYK image on an
RGB screen - and they're *all* RGB - you simply cannot view the colour
accurately at all without spending thousands on calibrated monitors.
But we're so used to pleasing colour production these days few people
have them any more, just colour specialist shops and printing
companies.

Hope this helps a bit... without actually seeing the files it's hard to
troubleshoot further.

Thanks.

Andrew
Fri, 16 November 2012 08:32 Go to previous messageGo to next message
danicocariu (Photoshop begginer)
I need some hex colour codes. Can anyone help me? Please!
http://smokebrushesforphotoshopcs5.blogspot.com
Tue, 09 April 2013 04:55 Go to previous message
PapillonHeroes (Photoshop begginer)
If the logo design in PhotoShop is in CMYK mode, no Preview app is
going to display the colour accurately because they, like Office apps,
only display colour in RGB mode. Sp there is a shift in the colour
immediately.

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