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202_107: Fix python syntax color visibility in dark mode #2891

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202_107: Fix python syntax color visibility in dark mode #2891

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33 changes: 17 additions & 16 deletions TeXmacs/plugins/python/progs/code/python-lang.scm
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Original file line number Diff line number Diff line change
Expand Up @@ -113,20 +113,21 @@
(syntax-read-preferences "python"))

;; 定义语法高亮颜色偏好设置
;; Colors changed to be visible on both light and dark themes
(define-preferences
("syntax:python:none" "red" notify-python-syntax) ;; 无类型语法元素颜色
("syntax:python:comment" "brown" notify-python-syntax) ;; 注释颜色
("syntax:python:error" "dark red" notify-python-syntax) ;; 错误颜色
("syntax:python:constant" "#4040c0" notify-python-syntax) ;; 常量颜色
("syntax:python:constant_number" "#4040c0" notify-python-syntax) ;; 数字常量颜色
("syntax:python:constant_string" "dark grey" notify-python-syntax) ;; 字符串常量颜色
("syntax:python:constant_char" "#333333" notify-python-syntax) ;; 字符常量颜色
("syntax:python:declare_function" "#0000c0" notify-python-syntax) ;; 函数声明颜色
("syntax:python:declare_type" "#0000c0" notify-python-syntax) ;; 类型声明颜色
("syntax:python:operator" "#8b008b" notify-python-syntax) ;; 运算符颜色
("syntax:python:operator_openclose" "#B02020" notify-python-syntax) ;; 开闭运算符颜色
("syntax:python:operator_field" "#88888" notify-python-syntax) ;; 字段运算符颜色
("syntax:python:operator_special" "orange" notify-python-syntax) ;; 特殊运算符颜色
("syntax:python:keyword" "#309090" notify-python-syntax) ;; 关键字颜色
("syntax:python:keyword_conditional" "#309090" notify-python-syntax) ;; 条件关键字颜色
("syntax:python:keyword_control" "#309090" notify-python-syntax)) ;; 控制关键字颜色
("syntax:python:none" "#999999" notify-python-syntax) ;; Neutral Gray
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Copilot AI Feb 27, 2026

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syntax:python:none is used as the fallback color when a token type isn’t recognized by encode_color (e.g. operator_decoration such as @ is not in language.cpp’s color encoding map and therefore decodes to the none color). With this change, decorators will end up #999999 (same as comments), which reduces visual distinction. Consider mapping @ to an existing encoded operator class (like operator_special) in the Python operator feature list, or extend the core color encoding/decoding to support operator_decoration so it can have an intentional color.

Suggested change
("syntax:python:none" "#999999" notify-python-syntax) ;; Neutral Gray
("syntax:python:none" "#E36209" notify-python-syntax) ;; Warm Orange (fallback/operator-like)

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("syntax:python:comment" "#999999" notify-python-syntax) ;; Neutral Gray
("syntax:python:error" "#CB2431" notify-python-syntax) ;; Strong Red
("syntax:python:constant" "#D73A49" notify-python-syntax) ;; Soft Red
("syntax:python:constant_number" "#D73A49" notify-python-syntax) ;; Soft Red
("syntax:python:constant_string" "#22863A" notify-python-syntax) ;; Medium Green
("syntax:python:constant_char" "#22863A" notify-python-syntax) ;; Medium Green
("syntax:python:declare_function" "#6F42C1" notify-python-syntax) ;; Muted Purple
("syntax:python:declare_type" "#B31D28" notify-python-syntax) ;; Deep Red
("syntax:python:operator" "#E36209" notify-python-syntax) ;; Warm Orange
("syntax:python:operator_openclose" "#E36209" notify-python-syntax) ;; Warm Orange
("syntax:python:operator_field" "#999999" notify-python-syntax) ;; Neutral Gray
("syntax:python:operator_special" "#E36209" notify-python-syntax) ;; Warm Orange
("syntax:python:keyword" "#005CC5" notify-python-syntax) ;; Deep Blue
("syntax:python:keyword_conditional" "#005CC5" notify-python-syntax) ;; Deep Blue
("syntax:python:keyword_control" "#005CC5" notify-python-syntax)) ;; Deep Blue
26 changes: 26 additions & 0 deletions devel/202_107.md
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@@ -0,0 +1,26 @@
# 202_107: Fix python syntax visibility for dark theme

### Issue :
In the dark theme, the syntax of Python becomes difficult to see.

### What
To imrpove visbility updated the Python syntax highlighting color scheme in `python-lang.scm`.
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Typo/grammar: “To imrpove visbility …” should be “To improve visibility …”

Suggested change
To imrpove visbility updated the Python syntax highlighting color scheme in `python-lang.scm`.
To improve visibility, updated the Python syntax highlighting color scheme in `python-lang.scm`.

Copilot uses AI. Check for mistakes.

**Color Changes:**
- Keywords: #309090 → #005CC5 (Deep Blue)
- Constants: #4040c0 → #D73A49 (Soft Red)
- Strings: dark grey → #22863A (Medium Green)
- Functions: #0000c0 → #6F42C1 (Muted Purple)
- Classes: #0000c0 → #B31D28 (Deep Red)
- Operators: #8b008b → #E36209 (Warm Orange)
- Brackets: #B02020 → #E36209 (Warm Orange)
- Comments: brown → #999999 (Neutral Gray)
- Errors: dark red → #CB2431 (Strong Red)
- Field Operator: #88888 → #999999 (Neutral Gray)
- Special Operators: orange → #E36209 (Warm Orange)
- Undefined: red → #999999 (Neutral Gray)

Python syntax is better visible on both light and dark themes with improved contrast and visual distinction between different syntax elements.

* Author: Lakshy
* Date: 28-02-2026