code: def _color(color: ContourColorOrPalette, n: int) -> ContourColor:
      # Dict to sequence of colors such as palettes.cividis
      if isinstance(color, dict):
          return _palette_from_collection(color, n)
  
      if (
          isinstance(color, Sequence)
          and not isinstance(color, (bytes, str))
          and len(color) != n
      ):
          return interp_palette(color, n)
  
      return color
  
imports: from __future__ import annotations
  import logging
  from typing import TYPE_CHECKING, Sequence, Union, cast
  import numpy
  from ..core.property_mixins import FillProps, HatchProps, LineProps
  from ..models.glyphs import MultiLine, MultiPolygons
  from ..models.renderers import ContourRenderer, GlyphRenderer
  from ..models.sources import ColumnDataSource
  from ..palettes import interp_palette
  from ..plotting._renderer import _process_sequence_literals
  from ..util.dataclasses import dataclass, entries
label_desc: Use image node_id 3 for calling a global function with example usage: _color(color, n) and returns: color, _palette_from_collection, interp_palette