qmk_firmware/keyboards/mechlovin/delphine/rgb_led/info.json

{
    "usb": {
        "pid": "0xDEF2",
        "device_version": "0.0.1"
    },
    "rgblight": {
        "sleep": true
    },
    "ws2812": {
        "pin": "E2"
    },
    "rgb_matrix": {
        "driver": "IS31FL3731"
    }
}