code: def _validate_color_or_linecolor(s):
      if cbook._str_equal(s, "linecolor"):
          return s
      elif cbook._str_equal(s, "mfc") or cbook._str_equal(
          s, "markerfacecolor"
      ):
          return "markerfacecolor"
      elif cbook._str_equal(s, "mec") or cbook._str_equal(
          s, "markeredgecolor"
      ):
          return "markeredgecolor"
      elif s is None:
          return None
      elif isinstance(s, str) and len(s) == 6 or len(s) == 8:
          stmp = "#" + s
          if is_color_like(stmp):
              return stmp
          if s.lower() == "none":
              return None
      elif is_color_like(s):
          return s
  
      raise ValueError(f"{s!r} does not look like a color arg")
  
imports: import ast
  from functools import lru_cache, reduce
  from numbers import Real
  import operator
  import os
  import re
  import numpy
  from matplotlib import _api, cbook
  from matplotlib.cbook import ls_mapper
  from matplotlib.colors import Colormap, is_color_like
  from matplotlib._fontconfig_pattern import parse_fontconfig_pattern
  from matplotlib._enums import JoinStyle, CapStyle
  from cycler import Cycler, cycler
label_desc: Use image node_id 15 for calling a global function with example usage: _validate_color_or_linecolor(s) and returns: s, str, str, None, stmp, None, s