Add GitHub's Dark Style (#2192)

2 files changed, 108 insertions, 0 deletions

diff --git a/pygments/styles/__init__.py b/pygments/styles/__init__.py
index 95ff03e3..be704b4c 100644
--- a/pygments/styles/__init__.py
+++ b/pygments/styles/__init__.py
@@ -61,6 +61,7 @@ STYLE_MAP = {
     'lilypond' : 'lilypond::LilyPondStyle',
     'nord': 'nord::NordStyle',
     'nord-darker': 'nord::NordDarkerStyle',
+    'github-dark': 'gh_dark::GhDarkStyle'
 }
 
 
diff --git a/pygments/styles/gh_dark.py b/pygments/styles/gh_dark.py
new file mode 100644
index 00000000..445a2ded
--- /dev/null
+++ b/pygments/styles/gh_dark.py
@@ -0,0 +1,107 @@
+"""
+    pygments.styles.gh_dark
+    ~~~~~~~~~~~~~~~~~~~~~~~
+
+    Github's Dark-Colorscheme based theme for Pygments
+    Colors extracted from https://github.com/primer/primitives
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+from pygments.style import Style
+from pygments.token import (Keyword, Name, Comment, Error, Number,
+                            Operator, Generic, Text, Literal, String, Token)
+
+
+# vars are defined to match the defs in
+# - [GitHub's VS Code theme](https://github.com/primer/github-vscode-theme) and
+# - [Primer styles](https://github.com/primer/primitives)
+RED_2 = "#ffa198"
+RED_3 = "#ff7b72"
+RED_9 = "#490202"
+ORANGE_2 = "#ffa657"
+ORANGE_3 = "#f0883e"
+GREEN_1 = "#7ee787"
+GREEN_2 = "#56d364"
+GREEN_7 = "#0f5323"
+BLUE_1 = "#a5d6ff"
+BLUE_2 = "#79c0ff"
+PURPLE_2 = "#d2a8ff"
+GRAY_3 = "#8b949e"
+GRAY_4 = "#6e7681"
+FG_SUBTLE = "#6e7681"
+FG_DEFAULT = "#c9d1d9"
+BG_DEFAULT = "#0d1117"
+DANGER_FG = "#f85149"
+
+
+class GhDarkStyle(Style):
+    """
+    Github's Dark-Colorscheme based theme for Pygments
+    """
+
+    background_color = BG_DEFAULT
+
+    # has transparency in VS Code theme as `colors.codemirror.activelineBg`
+    highlight_color = GRAY_4
+
+    line_number_special_color = FG_DEFAULT
+    line_number_special_background_color = FG_SUBTLE
+
+    line_number_color = GRAY_4
+    line_number_background_color = BG_DEFAULT
+
+    styles = {
+        Token:                      FG_DEFAULT,
+
+        Error:                      DANGER_FG,
+
+        Keyword:                    RED_3,
+        Keyword.Constant:           BLUE_2,
+        Keyword.Pseudo:             BLUE_2,
+
+        Name:                       FG_DEFAULT,
+        Name.Class:                 "bold "+ORANGE_3,
+        Name.Constant:              "bold "+BLUE_2,
+        Name.Decorator:             'bold '+PURPLE_2,
+        Name.Entity:                ORANGE_2,
+        Name.Exception:             "bold "+ORANGE_3,
+        Name.Function:              'bold '+PURPLE_2,
+        Name.Label:                 "bold "+BLUE_2,
+        Name.Namespace:             RED_3,
+        Name.Property:              BLUE_2,
+        Name.Tag:                   GREEN_1,
+        Name.Variable:              BLUE_2,
+
+        Literal:                    BLUE_1,
+        Literal.Date:               BLUE_2,
+        String:                     BLUE_1,
+        String.Affix:               BLUE_2,
+        String.Delimiter:           BLUE_2,
+        String.Escape:              BLUE_2,
+        String.Heredoc:             BLUE_2,
+        String.Regex:               BLUE_2,
+        Number:                     BLUE_1,
+
+        Comment:                    'italic '+GRAY_3,
+        Comment.Preproc:            "bold " + GRAY_3,
+        Comment.Special:            "bold italic " + GRAY_3,
+
+        Operator:                   'bold ' + RED_3,
+
+        Generic:                    FG_DEFAULT,
+        Generic.Deleted:            f"bg:{RED_9} {RED_2}",
+        Generic.Emph:               "italic",
+        Generic.Error:              RED_2,
+        Generic.Heading:            "bold "+BLUE_2,
+        Generic.Inserted:           f'bg:{GREEN_7} {GREEN_2}',
+        Generic.Output:             GRAY_3,
+        Generic.Prompt:             GRAY_3,
+        Generic.Strong:             "bold",
+        Generic.Subheading:         BLUE_2,
+        Generic.Traceback:          RED_3,
+        Generic.Underline:          "underline",
+
+        Text.Whitespace:            FG_SUBTLE,
+    }