Thread:Project:Support desk/Problem with image changing colour - different on logo & main page for same image/reply (2)

Thank you for that extremely helpful tip! Once you put me to thinking about ImageMagick, I found the answer quite quickly:

I took the image and used photoshop to change it from an 8-bit colour scheme to a 16-bit one. I also changed the colour coding from CMYK (I'm not sure why it was in that format in the first place, presumably somebody expected it to be printed out) into RGB.

Now it all works perfectly.