Dec 7, 2023
diff --git a/lib/matplotlib/colors.py b/lib/matplotlib/colors.py
        return True


 def is_hex_color(c):
    """
    (Helper function) Determines if the input string is a
    hexadecimal number in color format. String must start
    with # or 0x and have 8 bytes following, 2 for each color
    and alpha channel.
    """
    if not isinstance(c, str):
        return False
    if c.startswith('#'):
        if len(c) != 9:
            return False
        c = c[1:]
    elif c.startswith('0x'):
        if len(c) != 10:
            return False
        c = c[2:]
    else:
        return False

    for x in c:
        if x not in '0123456789abcdefABCDEF':
            return False

    return True


 def is_tuple_color(c):
    """
    (Helper function) Determines if the input string is a
    tuple in color format. Tuple must have two values: the
    first representing the color and the second representing
    the alpha value.
    """
    if not isinstance(c, tuple):
        return False
    if len(c) != 2:
        return False

    color = c[0]
    if not isinstance(color, str):
        return False
    if c != 'r' and c != 'g' and c != 'b':
        return False

    alpha = c[1]
    if not isinstance(alpha, float):
        return False
    if alpha < 0 or alpha > 1:
        return False

    return True


 def _has_alpha_channel(c):
    """Return whether *c* is a color with an alpha channel."""
 # 4-element sequences are interpreted as r, g, b, a
    returnnot isinstance(c, str) and len(c) == 4
 is_color = not isinstance(c, str) and len(c) == 4
    returnis_color or is_hex_color(c) or is_tuple_color(c)


 def _check_color_like(**kwargs):
Original file line number	Diff line number	Diff line change
Expand Up		@@ -231,10 +231,64 @@ def is_color_like(c):
		return True


		def is_hex_color(c):
		"""
		(Helper function) Determines if the input string is a
		hexadecimal number in color format. String must start
		with # or 0x and have 8 bytes following, 2 for each color
		and alpha channel.
		"""
		if not isinstance(c, str):
		return False
		if c.startswith('#'):
		if len(c) != 9:
		return False
		c = c[1:]
		elif c.startswith('0x'):
		if len(c) != 10:
		return False
		c = c[2:]
		else:
		return False

		for x in c:
		if x not in '0123456789abcdefABCDEF':
		return False

		return True


		def is_tuple_color(c):
		"""
		(Helper function) Determines if the input string is a
		tuple in color format. Tuple must have two values: the
		first representing the color and the second representing
		the alpha value.
		"""
		if not isinstance(c, tuple):
		return False
		if len(c) != 2:
		return False

		color = c[0]
		if not isinstance(color, str):
		return False
		if c != 'r' and c != 'g' and c != 'b':
		return False

		alpha = c[1]
		if not isinstance(alpha, float):
		return False
		if alpha < 0 or alpha > 1:
		return False

		return True


		def _has_alpha_channel(c):
		"""Return whether c is a color with an alpha channel."""
		# 4-element sequences are interpreted as r, g, b, a
		returnnot isinstance(c, str) and len(c) == 4
		is_color = not isinstance(c, str) and len(c) == 4
		returnis_color or is_hex_color(c) or is_tuple_color(c)


		def _check_color_like(**kwargs):
Expand Down