Colors were changed in 8.2 update. Details can be found here (RN: New colors of issue statuses).
I saw several threads and tickets mentioning this and the confusion this has created. You can like or dislike the colors. I do not like the new styles used, as it has been mentioned somewhere, even for color blindness it could be more difficult now to distinguish between these pastel tones.
Anyway, that discussion could be endless, and it could be just a matter of taste.
But at least to be consequent with this change Atlassian should have updated "Sprint Health Gadget". I know dashboards and gadgets have been forgotten for years, but some people are still using these things.
It is quite clear:
How can I explain above picture?
For Sprint progress, "In Progress" (it means, all statuses in that category) uses yellow.
But, for user stories status "IN PROGRESS" uses the new blue.
I think it's pretty obvious this change has an impact beyond personal tastes or color preferences.
Does the blue means "Open" (something pending) or "In Progress" (work in progress)
There is a ticket asking for a rollback or at least an option to use old colors:
I would suggest to the rest of the people facing this issue or thinking that this has been probably a wrong decision to vote for this change or option.