I'd like to have a collection of photos which are different ratios printed at the same size, using something cheap like a one-hour printing service.
I don't want to crop them, so was thinking of creating a new jpg in the right ratio with a neutral background surrounding the image.
I have Photoshop Elements to do this, question is what colour to use? Some years ago I attempted something similar, adding captions, black text in white box, but it threw the exposure off and they came back too dark. Is there a neutral colour which won't do this?
Thanks