Photo in PS is fine, upload it anywhere else and it's contrasted/darker?
When I work on a photo in PS it's fine, colours are okay - I upload them to imgur, picpar, tinypic, etc, it becomes contrasted and darker.
Here's the 'before'.

And here's the 'after'. It's a subtle difference but it adds green or blue to the colours and then makes it more contrasted. On other photos the difference isn't easily ignored and I'd really like there to be consistency.

If anyone can help me out with this I would greatly appreciate it, thank you.