code: def test_vectorized_to_hex_array(c_values):
      output = vectorized_to_hex(c_values)
      assert np.all([item == "#0000ff" for item in output])
  
imports: import importlib
  import numpy
  import pytest
  import xarray
  from ...data import from_dict
  from ...plots.backends.matplotlib import dealiase_sel_kwargs, matplotlib_kwarg_dealiaser
  from ...plots.plot_utils import compute_ranks, filter_plotters_list, format_sig_figs, get_plotting_function, make_2d, set_bokeh_circular_ticks_labels, vectorized_to_hex
  from ...rcparams import rc_context
  from ...sel_utils import xarray_sel_iter, xarray_to_ndarray
  from ...stats.density_utils import get_bins
  from ...utils import get_coords
  from ..helpers import running_on_ci
label_desc: Use image node_id 16 for calling a global function with example usage: test_vectorized_to_hex_array(c_values) without return types