From f9079e3619bc30afd3c7ac526bec75c16d36dac8 Mon Sep 17 00:00:00 2001
From: Helbronner <185764645+Helbronner@users.noreply.github.com>
Date: Wed, 17 Jun 2026 16:09:57 +0800
Subject: [PATCH 1/2] fix(code): inherit container background and adjust line
 number color

Using a custom `formatter_style` (such as a light theme) was previously overridden by the hardcoded dark `#222` default `fill_color`. This change dynamically extracts the native `background_color` attribute from the specified Pygments style to ensure the container matches the theme.

Additionally, updated the line number color logic: it now respects the color defined by the active Pygments style, falling back to `GRAY` if unspecified, preventing invisible white text on light backgrounds.

Fixes #4811
---
 manim/mobject/text/code_mobject.py | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/manim/mobject/text/code_mobject.py b/manim/mobject/text/code_mobject.py
index c9b66a9e3b..721e1581f2 100644
--- a/manim/mobject/text/code_mobject.py
+++ b/manim/mobject/text/code_mobject.py
@@ -14,7 +14,7 @@
 from pygments import highlight
 from pygments.formatters.html import HtmlFormatter
 from pygments.lexers import get_lexer_by_name, guess_lexer, guess_lexer_for_filename
-from pygments.styles import get_all_styles
+from pygments.styles import get_all_styles, get_style_by_name
 
 from manim.constants import *
 from manim.mobject.geometry.arc import Dot
@@ -22,7 +22,7 @@
 from manim.mobject.opengl.opengl_compatibility import ConvertToOpenGL
 from manim.mobject.types.vectorized_mobject import VGroup, VMobject
 from manim.typing import StrPath
-from manim.utils.color import WHITE, ManimColor
+from manim.utils.color import BLACK, GRAY, WHITE, ManimColor
 
 
 class Code(VMobject, metaclass=ConvertToOpenGL):
@@ -107,7 +107,7 @@ def construct(self):
     _styles_list_cache: list[str] | None = None
     default_background_config: dict[str, Any] = {
         "buff": 0.3,
-        "fill_color": ManimColor("#222"),
+        "fill_color": None,
         "stroke_color": WHITE,
         "corner_radius": 0.2,
         "stroke_width": 1,
@@ -203,6 +203,7 @@ def __init__(
             paragraph_config = {}
         base_paragraph_config = self.default_paragraph_config.copy()
         base_paragraph_config.update(paragraph_config)
+        base_paragraph_config.update({"color": BLACK})
 
         from manim.mobject.text.text_mobject import Paragraph
 
@@ -214,8 +215,16 @@ def __init__(
             for start, end, color in color_range:
                 line[start:end].set_color(color)
 
+        selected_style = get_style_by_name(formatter_style)
         if add_line_numbers:
             base_paragraph_config.update({"alignment": "right"})
+
+            line_number_color: str = selected_style.line_number_color
+            if line_number_color == "inherit":
+                base_paragraph_config.update({"color": GRAY})
+            else:
+                base_paragraph_config.update({"color": line_number_color})
+
             self.line_numbers = Paragraph(
                 *[
                     str(i)
@@ -239,6 +248,12 @@ def __init__(
         background_config_base = self.default_background_config.copy()
         background_config_base.update(background_config)
 
+        if background_config_base["fill_color"] is None:
+            background_color: str = selected_style.background_color
+            background_config_base.update({"fill_color": background_color})
+        else:
+            background_config_base.update({"fill_color": ManimColor("#222")})
+
         if background == "rectangle":
             self.background = SurroundingRectangle(
                 self,

From dd6c87b94f2b4522b0b97e09328a740d95ee3864 Mon Sep 17 00:00:00 2001
From: Helbronner <185764645+Helbronner@users.noreply.github.com>
Date: Wed, 17 Jun 2026 20:53:29 +0800
Subject: [PATCH 2/2] fix(code): respect user-defined fill_color for container
 background

Previously, user-defined background `fill_color` was accidentally overridden by the default fallback color. This fix ensures that the custom value is preserved, passing the related test assertions.
---
 manim/mobject/text/code_mobject.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/manim/mobject/text/code_mobject.py b/manim/mobject/text/code_mobject.py
index 721e1581f2..1021d32697 100644
--- a/manim/mobject/text/code_mobject.py
+++ b/manim/mobject/text/code_mobject.py
@@ -22,7 +22,7 @@
 from manim.mobject.opengl.opengl_compatibility import ConvertToOpenGL
 from manim.mobject.types.vectorized_mobject import VGroup, VMobject
 from manim.typing import StrPath
-from manim.utils.color import BLACK, GRAY, WHITE, ManimColor
+from manim.utils.color import BLACK, GRAY, WHITE
 
 
 class Code(VMobject, metaclass=ConvertToOpenGL):
@@ -251,8 +251,6 @@ def __init__(
         if background_config_base["fill_color"] is None:
             background_color: str = selected_style.background_color
             background_config_base.update({"fill_color": background_color})
-        else:
-            background_config_base.update({"fill_color": ManimColor("#222")})
 
         if background == "rectangle":
             self.background = SurroundingRectangle(