Alone

This image was drawn in 2000, on a ZX Spectrum that was connected to an old tv-set with a fairly unusual gamma setting. Because gamma was not really standartized back at the time, and also because the technique that surprised you also surprised many other people, a palette setting necessary to view this image correctly has been formulated (it is called, predictably, "alone"). At present we have better understanding of common gamma settings and the community more-or-less agreed to use more reasonable palette "pulsar" (which was developed empyrically) or even standard sRGB, as used by this site. You can see the difference between "alone" and "pulsar" when applied to this image here: https://hype.retroscene.org/blog/graphics/320.html#comment8401

Фишка со сменой палитр появилась всего пару лет назад - возможно, просто не выставлено до сих пор. Пусть автор решает, надо или не надо.