Add light shades and dark grey

Co-authored-by: Hendrik Buschmeier <hbuschme@uni-bielefeld.de>

src/termcolor/__main__.py

@@ -15,6 +15,14 @@
     cprint("Magenta color", "magenta")
     cprint("Cyan color", "cyan")
     cprint("White color", "white")
+    cprint("Light grey color", "light_grey")
+    cprint("Dark grey color", "dark_grey")
+    cprint("Light red color", "light_red")
+    cprint("Light green color", "light_green")
+    cprint("Light yellow color", "light_yellow")
+    cprint("Light blue color", "light_blue")
+    cprint("Light magenta color", "light_magenta")
+    cprint("Light cyan color", "light_cyan")
     print("-" * 78)
 
     print("Test highlights:")
@@ -26,6 +34,14 @@
     cprint("On magenta color", on_color="on_magenta")
     cprint("On cyan color", on_color="on_cyan")
     cprint("On white color", color="black", on_color="on_white")
+    cprint("On light grey color", on_color="on_light_grey")
+    cprint("On dark grey color", on_color="on_dark_grey")
+    cprint("On light red color", on_color="on_light_red")
+    cprint("On light green color", on_color="on_light_green")
+    cprint("On light yellow color", on_color="on_light_yellow")
+    cprint("On light blue color", on_color="on_light_blue")
+    cprint("On light magenta color", on_color="on_light_magenta")
+    cprint("On light cyan color", on_color="on_light_cyan")
     print("-" * 78)
 
     print("Test attributes:")

src/termcolor/termcolor.py

@@ -61,7 +61,15 @@ def __getattr__(name: str) -> list[str]:
     "on_blue": 44,
     "on_magenta": 45,
     "on_cyan": 46,
-    "on_white": 47,
+    "on_light_grey": 47,
+    "on_dark_grey": 100,
+    "on_light_red": 101,
+    "on_light_green": 102,
+    "on_light_yellow": 103,
+    "on_light_blue": 104,
+    "on_light_magenta": 105,
+    "on_light_cyan": 106,
+    "on_white": 107,
 }
 
 COLORS = {
@@ -73,7 +81,15 @@ def __getattr__(name: str) -> list[str]:
     "blue": 34,
     "magenta": 35,
     "cyan": 36,
-    "white": 37,
+    "light_grey": 37,
+    "dark_grey": 90,
+    "light_red": 91,
+    "light_green": 92,
+    "light_yellow": 93,
+    "light_blue": 94,
+    "light_magenta": 95,
+    "light_cyan": 96,
+    "white": 97,
 }
 
 
@@ -104,10 +120,14 @@ def colored(
     """Colorize text.
 
     Available text colors:
-        black, red, green, yellow, blue, magenta, cyan, white.
+        black, red, green, yellow, blue, magenta, cyan, white,
+        light_grey, dark_grey, light_red, light_green, light_yellow, light_blue,
+        light_magenta, light_cyan.
 
     Available text highlights:
-        on_black, on_red, on_green, on_yellow, on_blue, on_magenta, on_cyan, on_white.
+        on_black, on_red, on_green, on_yellow, on_blue, on_magenta, on_cyan, on_white,
+        on_light_grey, on_dark_grey, on_light_red, on_light_green, on_light_yellow,
+        on_light_blue, on_light_magenta, on_light_cyan.
 
     Available attributes:
         bold, dark, underline, blink, reverse, concealed.

tests/test_termcolor.py

@@ -56,14 +56,18 @@ def assert_cprint(
 @pytest.mark.parametrize(
     "color, expected",
     [
+        ("black", "\x1b[30mtext\x1b[0m"),
         ("grey", "\x1b[30mtext\x1b[0m"),
         ("red", "\x1b[31mtext\x1b[0m"),
         ("green", "\x1b[32mtext\x1b[0m"),
         ("yellow", "\x1b[33mtext\x1b[0m"),
         ("blue", "\x1b[34mtext\x1b[0m"),
         ("magenta", "\x1b[35mtext\x1b[0m"),
         ("cyan", "\x1b[36mtext\x1b[0m"),
-        ("white", "\x1b[37mtext\x1b[0m"),
+        ("white", "\x1b[97mtext\x1b[0m"),
+        ("light_grey", "\x1b[37mtext\x1b[0m"),
+        ("dark_grey", "\x1b[90mtext\x1b[0m"),
+        ("light_blue", "\x1b[94mtext\x1b[0m"),
     ],
 )
 def test_color(
@@ -83,14 +87,18 @@ def test_color(
 @pytest.mark.parametrize(
     "on_color, expected",
     [
+        ("on_black", "\x1b[40mtext\x1b[0m"),
         ("on_grey", "\x1b[40mtext\x1b[0m"),
         ("on_red", "\x1b[41mtext\x1b[0m"),
         ("on_green", "\x1b[42mtext\x1b[0m"),
         ("on_yellow", "\x1b[43mtext\x1b[0m"),
         ("on_blue", "\x1b[44mtext\x1b[0m"),
         ("on_magenta", "\x1b[45mtext\x1b[0m"),
         ("on_cyan", "\x1b[46mtext\x1b[0m"),
-        ("on_white", "\x1b[47mtext\x1b[0m"),
+        ("on_white", "\x1b[107mtext\x1b[0m"),
+        ("on_light_grey", "\x1b[47mtext\x1b[0m"),
+        ("on_dark_grey", "\x1b[100mtext\x1b[0m"),
+        ("on_light_blue", "\x1b[104mtext\x1b[0m"),
     ],
 )
 def test_on_color(