def METHOD_NAME(colormap_name: str, height=100) -> QImage:
    colormap = colormaps.calculate_numpy_brga_for(colormap_name)
    indices = np.zeros((len(colormap), height), dtype=np.int64)
    for i in np.arange(len(colormap), dtype=np.int64):
        indices[i, :] = np.repeat(i, height)
    return Spectrogram.create_image(indices, colormap, normalize=False)