Was the file saved in some method that would alter the color? What format is the file in? What color-space (rgb, cmyk, etc.)
Not sure, but in what mode are you? Not "Index" I presume? Also, does the wanted colour fit in the colour space you’re using? Rob
The original logo from the designer was an eps that I opened in Photoshop in CMYK mode. The new foreground/fill color I select is 286, which, until I actually fill the old blue also LOOKS like the blue I want (as seen in the foreground box). But after filling the old blue and testing with the eyedropper, the color picker indicates that the color filled is Pantone 653, way off from 286. Interestingly, when I open the original blue logo in Illustrator CMYK it both indicates and looks like the blue I want, Pantone 286.
Unless you’re using Spot Color Channels, all your going to get is a CMYK approximation. And that approximation is going to depend on what your color management settings are.
To elaborate, many Pantone colors cannot be duplicated on the CMYK palette, which is smaller than the RGB palette (and much smaller than the palette of the human eye.)
Thus, when you select a color that is in the RGB palette, and can thus be seen on a computer monitor, but while working in CMYK mode, PS changes the color to the nearest in gamut color in CMYK.
What to do depends on the final use of the image. If it is going to be printed, then you will need to make a spot color channel, as Mark says. This will increase the printing cost significantly.
If the job is for the web or multimedia, just convert to RGB mode, and you are laughing.
Palette = range of colors available