Color Change Question, Photoshop CS4

Hope I'm clear with this description...
Say, you want to change a background in a given image from a certain blue to a certain yellow and then possibly back again....you're just curious as to which background would look better. Is there a command in Photoshop CS4 which, in effect, makes Photoshop "change color 'A' to color 'B' everywhere it appears in the image"? short of re-painting entire areas with a graphics tablet/mouse?
Thanks...

Try using Image/Adjustment/Replace Color to do this.

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Unfortunately, it is not the one that you need. The Photoshop fora are HERE. Just choose the version/platform that you need and ask again. You will get help.
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Please note that your post is already buried in the old pages of the forum.
Due to the current unavailability of clairvoyants and mind-readers in the forum, we respectfully request you supply sensible, complete details.
BOILERPLATE TEXT:
Note that because this is boilerplate text, not all points may apply to any given, specific poster.
If you give complete and detailed information about your setup and the issue at hand,
such as your platform (Mac or Win),
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your settings in Photoshop > Preference > Performance
the type of file you were working on,
machine specs, such as total installed RAM, scratch file HDs, total available HD space, video card specs, including total VRAM installed,
what troubleshooting steps you have taken so far,
what error message(s) you receive,
if having issues opening raw files also the exact camera make and model that generated them,
if you're having printing issues, indicate the exact make and model of your printer, paper size, image dimensions in pixels (so many pixels wide by so many pixels high). if going through a RIP, specify that too.
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http://forums.adobe.com/thread/419981?tstart=0
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Message was edited by: Hazell

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Hi all,
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a search for Aperture revealed zero posts on the Apple software product
A search for 'Aperture' shows 103 hits including aperture grille for cathode ray tube monitors, apertures for spectrophotometers (the larger the aperture the larger the sampling area for low dot per inch devices such as inkjets) and a handful on Apple Aperture.
The point in asking the ColorSync Users List is that the people on that list are consultants and developers who have been discussing configuration complexities since the ColorSync Users List started in 1998. Part of the developer discussion has shifted to the list on www.color.org, since the ColorSync Developer List was always thinly trafficked.
/hh
/hh

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Hello.
This is the image I want to color.

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Color Change Question, Photoshop CS4

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