Variable SPECTRUM_COLORS`Const`

SPECTRUM_COLORS: readonly [
    "channel",
    "intensity",
    "rainbow",
    "moreland",
    "nebulae",
    "fire",
    "fiery",
    "fruit",
    "cool",
    "magma",
    "green",
    "viridis",
    "plasma",
    "cividis",
    "terrain",
] = ...

Palettes accepted by the showspectrum filter's color option. These map to ffmpeg's integer enum (0–14) — they are not CSS colours.