Mike,
First make sure it’s not your monitor. (run Adobe Gamma). Then, if it is colour correction; find something in the image that ought to be some shade of gray. Then use the middle eye dropper in the Curves panel to correct it.
If, on the other hand, you want to shift the colour linearly towards blue, then use the channel mixer and take out some red and green.
Try to do all this on a new layer, so the original remains.
Rob
My monitor is calibrated pretty well, although I should recalibrate again as it has been some time. My prints for these images are also coming out purple so my monitor is matched frailly well with my printer.
Rob, if using the channel mixer, do I take out the red and green out of the blue channel?
If you haven’t calibrated your monitor yet, do it.
If you have:
What image mode is the picture in? RGB? CMYK? What printer are you printing to?
Bob
Working in RGB. The prints are matching my monitor so the monitor is calibrated OK. Prints are the same on Epson 2200 and R800 on glossy and matte paper. Its not all prints, just a few pictures that I cannot get color corrected properly in photoshop.
Mike
What seems to be happening to your pictures is that you have come up against a printer limitation. The deep blues tend to print purple because the inks cannot cope with those colors. Purple is really a shade of magenta and the color which neutralizes magenta is green. Since your monitor is giving you an accurate preview of the print, you can bring up curves, select the green channel, ctrl click the purple area and move the green curve until the purple color shifts back to blue.
Raymond
Thanks Raymond, I’ll try this method.
you can also use image>adjustments>selective color, go to blues (make sure absolute is checked at the bottom) and drag back the slider on the magenta bar.