presentation development

There will, most likely only be 4 colours in the photographs, as my favorite edits are the orange and blue ones, and I would like to give them a border of some kind. I've looked at different possible borders - Light blue, dark blue, light orange, yellow, red, purple, black and white.
I decided that the border I liked most was the dark blue one for the orange and blue edits and the white or black for the rest.