Yeah; I think so. When I got this file originally, I think it was from here: https://en.wikipedia.org/wiki/File:Neptune_Voyager2_color_calibrated.png

which says:

Neptune on 1989-08-17, taken by NASA’s Voyager 2 probe. This color image was composed of three frames, orange, green, and blue, taken by Voyager 2’s imaging system. This color image has been calibrated to best represent Neptune’s true color and appearance. Based on: (in English) Irwin, Patrick G J (2023-12-23). “Modelling the seasonal cycle of Uranus’s colour and magnitude, and comparison with Neptune”. Monthly Notices of the Royal Astronomical Society 527 (4): 11521–11538. DOI:10.1093/mnras/stad3761. ISSN 0035-8711

It looks like I re-compressed the version I posted with webp to reduce the file size for quicker viewing on lemmy – so the colors in that are a little off from the PNG on Wikipedia, but are still closer than the classic enhanced color image.

darkblue

It’s also light blue; pictures of it were just always published with exaggerated colors for a long time. It’s actually more like this if you do better color calibration, apparently: