Star colours and star classes in No Man's Sky: what G6pf means

Yellow, red, green, blue or purple: what a No Man's Sky star class like G6pf means, which colour is rarest, and what each colour tells you about a system.

The five star colours

Every star system in No Man's Sky has one sun colour, shown on the galaxy map and in the system's class. On one million systems predicted across Euclid:

  • Yellow: 65.6 %, the colour of most systems, and of every black hole.
  • Purple: 11.7 %, opened by the Worlds Part II update (see Purple stars).
  • Red: 7.6 %.
  • Blue: 7.6 %.
  • Green: 7.5 %.

The catalogue of recorded systems is far more yellow, around 90 %: players chart black holes and the systems around them first, and black holes only appear in yellow systems. The spectral page of the Observatory shows both counts side by side.

Reading a star class: G6pf

The class shown in the game, for example G6pf, has up to four parts.

  • The letter is the colour. Yellow suns are F or G, red ones K or M, blue ones B or O, purple ones X or Y, and green ones are always E.
  • The digit, from 0 to 9, refines the class.
  • p, after the digit, is an optional mark.
  • f, at the end, is another optional mark.

So G6pf is a yellow sun, of subclass 6, with both marks. The letters O, B, F, G, K and M come from real astronomy, where they run from the hottest stars to the coolest; E, X and Y are inventions of the game, for colours real stars do not have.

Do the digit and the letters matter?

As far as the data shows, not for play. In the catalogue, the ten digits each appear about one time in ten, and the marks split into four even shares: no mark, p, f, and pf, about a quarter each. Nothing on this site links them to wealth, conflict or planets.

The colour, on the other hand, matters a lot.

What the colour tells you

  • Your hyperdrive: red needs the Cadmium Drive, green the Emeril Drive, blue the Indium Drive, purple the Atlantid Drive. Yellow is open from the start.
  • Who lives there: on the predicted million, every yellow system has a dominant lifeform, while 95 % of red systems have none, and about a third of green and blue ones. See Gek, Korvax, Vy'keen.
  • Black holes: yellow only. See Black holes.

One, two or three suns

Most systems have a single sun. Among recorded systems where the count was noted, 85 % have one sun, 11 % two and 4 % three.

Find a system by colour

Last updated: 1 November 2026

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