Color palettes for Firefly Zero
You can use any 16-color color palettes with Firefly Zero. To make your life easier, we've generated code snippets for different languages by Firefly Zero for top palettes from Lospec.
GRAYSCALE 16 by SZIEBERTH Ádám
Most distinctive 16 grays. For other number of colors, see the link in my comment.
Galaxy Flame by Rhoq
Made this for the "Let the Galaxy Burn" event (though I did not finish my wip in time). Warm tones for distant galactic gas clouds, flames and stars, and the cool tones for skies, spaceships, and other science-fictional constructs. Semi-saturated darks in red, blue, and green to keep some life in the deep places.
Color Graphics Adapter
CGA was a graphics card released in 1981 for the IBM PC. The standard mode uses one of two 4-color palettes (each with a low-intensity and high-intensity mode), but a hack allows use of all 16. #cga
Darkseed 16 by Ricardo Juchem
This is a palette inspired by the Dark Seed game and Giger's Alien
Summers Past-16 by keidding
A warm 16 color palette of evoking the nostalgia of the passing summers. (Created to be simple and user friendly)
antiquity16 by ILTA
A celebration for getting to 2k followers on my Twitter! 🎉 Nostalgic palette based on old vintage ads. Includes a variety of skintones!
Miyazaki 16 by skeddles
Created for Pixelsnorf in exchange for 128 Pikzels. The specifications was a nonlinear 16-color palette inspired by the art of Hayou Miyazaki, specifically landscapes.
Eroge Copper
"There was some activity over at the pixeljoint forums (I'm not registered though) to do a 16 color palette with character. I took this to mean that the palette should have a heavy focus on some colors, and less on others." -Arne Niklas Jansson
WoodSpark by Anubi
WoodSpark is a general purpose palette with 16 vibrant, saturated colors that aims at providing just enough colors to make essentially anything come true. May it be from the main Red, Green and Blue colors, or others like Gray, Pink and Brown, it has all the basics covered to get you going.
(EDIT: Important, don't confuse the name with "16 bit")
JMP (Japanese Machine Palette)
"I wanted to do the MSX palette because it has some character. I suppose there aren't any "official" RGB colors for it though." -Arne Niklas Jansson
Pastel Pop-16 Color by AxulArt
Although it says "16 colors", there are really only 15 colors, since one of those colors is used for transparencies 
, I wanted to create a color palette that could achieve many harmonious combinations with just a few colors. I guess it would be ideal for fantasy consoles (if you don't mind pastel tones) or for retro aesthetics like the GameBoy Color 
. You can see more of my art at: https://axulart.tumblr.com/ and https://axulart.itch.io/
Psygnosia
"Psygnosis often used palettes in the muddy range (It was often the copper skies which added a touch of color). This particular one was inspired by the game Ork." -Arne Niklas Jansson
Corruption-16 by Creepy Cute Games
A muted and muddy Palette with some "fleshy" accents that I created for my Lovecraft-themed Roguelike "The Ruins of of Calaworm".
Commodore VIC-20
The Commodore VIC-20 was an 8-bit computer released by Commodore Business Machines in 1980.
Super16 by le
A Super Nintendo Sprite Palette I Made With The 16 Color Limit Of The SNES Palette, And Uses The 15 Bit RGB Of The SNES, "Each SNES sprite can have 16 colors and a palette slot out of 8 total palette slots." (https://megacatstudios.com/blogs/retro-development/snes-sprite-engine-design-guidelines)