There are many black and white photos that could have been done in colour, and many colour photos that could have been done in black in white.
The difference is in the intent. In the sense that in some cases, the colour photograph is not only about the subject it depicts, but also in part about colour itself—to a point where sometimes you wonder if the photograph isn't
solely about colour.
There are contemporary photographers for whom this holds true, i.e., who use colour as an integral and essential part of composition itself. Top of my mind, I can think of:
Alex Webb and his wife Rebecca Norris Webb
Alex Webb and Rebecca Norris Webb discuss their deeply interwoven joint photography and poetry book project
www.magnumphotos.com
Harry Gruyaert
For his new book, Gruyaert selected images from his archive of more than a half-century photographing Morocco. The work, unpublished until now, shows the country's people and landscapes from the perspective of a passionate outsider.
www.magnumphotos.com