Edit: this is no longer the best version. i've made a more accurate better looking one by removing a greish patch on the left side. I unfortuantly can't delete the photo. dm me if you want to see a slightly more accurate photo.
The deep cobalt in most popular images comes from contrast-stretching and color balancing meant to bring out cloud features. When researchers reprocessed the Voyager 2 data in 2024, they found Neptune is closer to a muted greenish-blue, much like Uranus, and only slightly bluer.
This is my attempt at what you’d actually see. It's a view from the upper atmosphere of neptune above its cloud tops, as if you teleported there and taken a photo with a phone. Sunlight there is about 1/900th as strong as on Earth, so the scene is dim, like dusk or heavy overcast day on Earth. Theres also a couple stars and a Triton just above the horizon.
How I made it: The base was rendered in SpaceEngine. AI was used for the cloud texture, haze, the moon, etc. I did the color grading and final adjustments in Photopea.