BUG: Limited available colors

pandas/io/formats/excel.py

@@ -65,27 +65,156 @@ class CSSToExcelConverter:
         CSS processed by :meth:`__call__`.
     """
 
+    # source: matplotlib 3.3.3, matplotlib.colors.CSS4_COLORS
     NAMED_COLORS = {
-        "maroon": "800000",
-        "brown": "A52A2A",
-        "red": "FF0000",
-        "pink": "FFC0CB",
-        "orange": "FFA500",
-        "yellow": "FFFF00",
-        "olive": "808000",
-        "green": "008000",
-        "purple": "800080",
-        "fuchsia": "FF00FF",
-        "lime": "00FF00",
-        "teal": "008080",
+        "aliceblue": "F0F8FF",
+        "antiquewhite": "FAEBD7",
         "aqua": "00FFFF",
-        "blue": "0000FF",
-        "navy": "000080",
+        "aquamarine": "7FFFD4",
+        "azure": "F0FFFF",
+        "beige": "F5F5DC",
+        "bisque": "FFE4C4",
         "black": "000000",
+        "blanchedalmond": "FFEBCD",
+        "blue": "0000FF",
+        "blueviolet": "8A2BE2",
+        "brown": "A52A2A",
+        "burlywood": "DEB887",
+        "cadetblue": "5F9EA0",
+        "chartreuse": "7FFF00",
+        "chocolate": "D2691E",
+        "coral": "FF7F50",
+        "cornflowerblue": "6495ED",
+        "cornsilk": "FFF8DC",
+        "crimson": "DC143C",
+        "cyan": "00FFFF",
+        "darkblue": "00008B",
+        "darkcyan": "008B8B",
+        "darkgoldenrod": "B8860B",
+        "darkgray": "A9A9A9",
+        "darkgreen": "006400",
+        "darkgrey": "A9A9A9",
+        "darkkhaki": "BDB76B",
+        "darkmagenta": "8B008B",
+        "darkolivegreen": "556B2F",
+        "darkorange": "FF8C00",
+        "darkorchid": "9932CC",
+        "darkred": "8B0000",
+        "darksalmon": "E9967A",
+        "darkseagreen": "8FBC8F",
+        "darkslateblue": "483D8B",
+        "darkslategray": "2F4F4F",
+        "darkslategrey": "2F4F4F",
+        "darkturquoise": "00CED1",
+        "darkviolet": "9400D3",
+        "deeppink": "FF1493",
+        "deepskyblue": "00BFFF",
+        "dimgray": "696969",
+        "dimgrey": "696969",
+        "dodgerblue": "1E90FF",
+        "firebrick": "B22222",
+        "floralwhite": "FFFAF0",
+        "forestgreen": "228B22",
+        "fuchsia": "FF00FF",
+        "gainsboro": "DCDCDC",
+        "ghostwhite": "F8F8FF",
+        "gold": "FFD700",
+        "goldenrod": "DAA520",
         "gray": "808080",
+        "green": "008000",
+        "greenyellow": "ADFF2F",
         "grey": "808080",
+        "honeydew": "F0FFF0",
+        "hotpink": "FF69B4",
+        "indianred": "CD5C5C",
+        "indigo": "4B0082",
+        "ivory": "FFFFF0",
+        "khaki": "F0E68C",
+        "lavender": "E6E6FA",
+        "lavenderblush": "FFF0F5",
+        "lawngreen": "7CFC00",
+        "lemonchiffon": "FFFACD",
+        "lightblue": "ADD8E6",
+        "lightcoral": "F08080",
+        "lightcyan": "E0FFFF",
+        "lightgoldenrodyellow": "FAFAD2",
+        "lightgray": "D3D3D3",
+        "lightgreen": "90EE90",
+        "lightgrey": "D3D3D3",
+        "lightpink": "FFB6C1",
+        "lightsalmon": "FFA07A",
+        "lightseagreen": "20B2AA",
+        "lightskyblue": "87CEFA",
+        "lightslategray": "778899",
+        "lightslategrey": "778899",
+        "lightsteelblue": "B0C4DE",
+        "lightyellow": "FFFFE0",
+        "lime": "00FF00",
+        "limegreen": "32CD32",
+        "linen": "FAF0E6",
+        "magenta": "FF00FF",
+        "maroon": "800000",
+        "mediumaquamarine": "66CDAA",
+        "mediumblue": "0000CD",
+        "mediumorchid": "BA55D3",
+        "mediumpurple": "9370DB",
+        "mediumseagreen": "3CB371",
+        "mediumslateblue": "7B68EE",
+        "mediumspringgreen": "00FA9A",
+        "mediumturquoise": "48D1CC",
+        "mediumvioletred": "C71585",
+        "midnightblue": "191970",
+        "mintcream": "F5FFFA",
+        "mistyrose": "FFE4E1",
+        "moccasin": "FFE4B5",
+        "navajowhite": "FFDEAD",
+        "navy": "000080",
+        "oldlace": "FDF5E6",
+        "olive": "808000",
+        "olivedrab": "6B8E23",
+        "orange": "FFA500",
+        "orangered": "FF4500",
+        "orchid": "DA70D6",
+        "palegoldenrod": "EEE8AA",
+        "palegreen": "98FB98",
+        "paleturquoise": "AFEEEE",
+        "palevioletred": "DB7093",
+        "papayawhip": "FFEFD5",
+        "peachpuff": "FFDAB9",
+        "peru": "CD853F",
+        "pink": "FFC0CB",
+        "plum": "DDA0DD",
+        "powderblue": "B0E0E6",
+        "purple": "800080",
+        "rebeccapurple": "663399",
+        "red": "FF0000",
+        "rosybrown": "BC8F8F",
+        "royalblue": "4169E1",
+        "saddlebrown": "8B4513",
+        "salmon": "FA8072",
+        "sandybrown": "F4A460",
+        "seagreen": "2E8B57",
+        "seashell": "FFF5EE",
+        "sienna": "A0522D",
         "silver": "C0C0C0",
+        "skyblue": "87CEEB",
+        "slateblue": "6A5ACD",
+        "slategray": "708090",
+        "slategrey": "708090",
+        "snow": "FFFAFA",
+        "springgreen": "00FF7F",
+        "steelblue": "4682B4",
+        "tan": "D2B48C",
+        "teal": "008080",
+        "thistle": "D8BFD8",
+        "tomato": "FF6347",
+        "turquoise": "40E0D0",
+        "violet": "EE82EE",
+        "wheat": "F5DEB3",
         "white": "FFFFFF",
+        "whitesmoke": "F5F5F5",
+        "yellow": "FFFF00",
+        "yellowgreen": "9ACD32",
     }
 
     VERTICAL_MAP = {

pandas/tests/io/formats/test_to_excel.py

@@ -2,6 +2,7 @@
 
 ExcelFormatter is tested implicitly in pandas/tests/io/excel
 """
+import string
 
 import pytest
 
@@ -313,3 +314,9 @@ def test_css_to_excel_bad_colors(input_color):
     with tm.assert_produces_warning(CSSWarning):
         convert = CSSToExcelConverter()
         assert expected == convert(css)
+
+
+def tests_css_named_colors_valid():
+    upper_hexs = set(map(str.upper, string.hexdigits))
+    for color in CSSToExcelConverter.NAMED_COLORS.values():
+        assert len(color) == 6 and all(c in upper_hexs for c in color)