https://mocio89.github.io/

glTF color change: baseColorFactor [0-1] => RGB[0-255]/400

 "materials": [
        {
            "name": "SVGMat.003",
            "alphaMode": "OPAQUE",
            "extras": {
                "fromFBX": {
                    "shadingModel": "Phong",
                    "isTruePBR": false
                }
            },
            "pbrMetallicRoughness": {
                "baseColorFactor": [  //= RGB[0-255]/400
                    0.445,
                    0.515,
                    0.46,
                    1.0
                ],
                "metallicFactor": 0.400000005960464,
                "roughnessFactor": 0.229415729641914
            }
        }
    ],