This needs true-color rendering with colored lighting at the very least. It's not fun when everything is grey/brown pixel smudge.
https://github.com/leilei-/Engoo
Both are Q1 though. However, the gray-ish/brown-ish look is entirely dependent on the color palette that you chose to use in your game. You have 256 colors to choose from, and with the 256x320 colormap, you get 64 shades of each.
And engoo is very good; I was one of its beta testers!