def METHOD_NAME(r: float, g: float, b: float):
    """Sets the diffuse light color reflected by the next :any:`blinn_phong_material`.
    :param r: red channel
    :param g: green channel
    :param b: blue channel
    """
    ensure_p3d("diffuse")
    p5.renderer.style.METHOD_NAME = np.array(scale_tuple((r, g, b)), dtype=np.float32)