Quote Originally Posted by pauland View Post
Looking at the PDF in Acrobat Pro, the colours used are "DeviceCMYK" and converting them to DeviceRGB, restores the colour.
The reason this is not a solution is two-fold.

One, the colors will be converted back to similar values at press-time.

Two, the outlines are a strange rich black value while the black fills are 100% K. This will always cause the blacks to be vastly different in print, precisely like you see in the original PDF.

Take care, Mike