SDL_Palette.3type - Man Page

#include <SDL3/SDL_pixels.h>

typedef struct SDL_Palette
{
    int ncolors;        /**< number of elements in `colors`. */
    SDL_Color *colors;  /**< an array of colors, `ncolors` long. */
    Uint32 version;     /**< internal use only, do not touch. */
    int refcount;       /**< internal use only, do not touch. */
} SDL_Palette;

This struct is available since SDL 3.2.0.

SDL_SetPaletteColors(3)