Q: The color/brightness/tone of my image changes when I use
Save for Web. Why?
A: Photoshop is a color-managed application. The Web is not. Normally, when you view an image in
Save for Web or
ImageReady you are viewing it without color management and see it how it will appear when uploaded to the Web.
To minimize changes, Convert your image to sRGB (i.e from
Edit menu choose
Convert to Profile )before using
Save for Web. You should also make sure that
Save for Web has been configured so that images are displayed using the document color profile (see attached screenshot for guidance).
You should also ensure that your monitor properly calibrated and the gamma is set to 2.2.