Web Design Software: Color shift from Photoshop to Dreamweaver

started by Cyberkashi on Apr 26, 2004 — RSS Feed

Cyberkashi Cyberkashi
Posts: 2

I am experiencing a huge color shift in some of the images I optimize in Photoshop and insert in Dreamweaver.  For example, I have a brown door with a bronze handle and brass kickplate that I optimize in PNG-8 or GIF.  It is totally blue in Dreamweaver MX 2004.  It displays correctly in IE when I save the HTML in Dreamweaver.

In Photoshop, I am working in RGB and have Color Profile Embedding turned off.  Why am I getting this color shift?  Why does it only happen with some images?  I cannot find the distinction among images that causes this to occur.

Any help would be appreciated. ???

Joe Gillespie Joe Gillespie
Posts: 528

It is very difficult to diagnose thing like this with the amount of information you give.

What platform are you on for a start? Which versions of Dreamweaver and Photoshop? If the colour shift only happens in Dreamweaver and not in browsers then it could just be a Dreamweaver problems.

Have you tried other browsers? Have you tried Opera? - Dreamweaver uses Opera's rendering engine.

Need to narrow-down the possibilities!

Cyberkashi Cyberkashi
Posts: 2

Thanks for your prompt response.  I have learned from another technical resource that Photoshop 7 (the version I am using) still has trouble rendering PNG-8 files.  I am using Dreamweaver MX 2004.  The problem is not with browsers--it is rendered correctly there.  It is just that not all my PNG-8 files are displaying properly in Dreamweaver after being optimized in ImageReady.  A technical explanation that I received, that is consistent with my experience, is included below for anyone else who may be having this problem:

"Adobe's Photoshop, considered by many to be the preeminent image-editing application, is slowly improving but still is not at the level one might expect given its price tag. PS 7.0 fixes all known PNG
bugs in previous versions, but its compression remains poor (reportedly), it cannot write 16-bit color channels (in PNG images, that is), and it has no support at all for RGBA palettes or text annotations.
(It also silently "flattens" color data in areas where the image's alpha channel indicates complete transparency, which is a lossy operation and
which may surprise users who expected truly lossless storage. Adobe does not consider this a bug.)..."

Joe Gillespie Joe Gillespie
Posts: 528

I've noticed a very slight colour shift in PNG-8s in Photoshop CS (Mac OSX) that doesn't occur in GIFs. It's only significant if you try to match a foreground image with a background colour in which case it's usually a few clicks off. I have never seen anything as dramatic as what you described with your door image. Photoshop PNG-8s, in most instances, are considerably smaller than GIFs of the same colour depth.

Jumi Ram Jumi Ram
Posts: 31

Hello Cyberkashi,
Photoshop is a color managed environment. Dreamweaver and browsers and the
web are not.Easiest solution is to disable color management in Photoshop for that image then export your slices.
Thank you.
jumi
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