graphics_set_palette
graphics_set_palette(15, r, g, b);
graphics_set_palette(0, r, g, b);
graphics_set_palette(0, PALETTE_RED(background), PALETTE_GREEN(background),
graphics_set_palette(index, PALETTE_RED(color),
graphics_set_palette(15, PALETTE_RED(foreground),
graphics_set_palette(0x11, PALETTE_RED(border), PALETTE_GREEN(border),
void graphics_set_palette(int idx, int red, int green, int blue);
void graphics_set_palette(int idx, int red, int green, int blue);