custom_nodes/ComfyUI-VideoHelperSuite/video_formats/gifski.json

{
    "main_pass":
    [
        "-pix_fmt", "yuv444p",
        "-vf", "scale=out_color_matrix=bt709:out_range=pc",
        "-color_range", "pc"
    ],
    "extension": "gif",
    "gifski_pass": [
        "-Q", ["quality","INT", {"default": 90, "min": 1, "max": 100, "step": 1}]
    ]
}