Uxntal Sublime Text 4 Syntax Definition and Color Scheme for Material Theme Dark.

Material-Theme.sublime-color-scheme

{
    "name": "Uxntal Material Color Scheme",
    "variables": {
        "pink": "#f07178",
        "green": "#c3e88d",
        "dark_green": "#009688",
        "blue": "#82aaff",
        "pale_blue": "#B2CCD6",
        "aqua": "#7af8ca",
        "red": "rgb(255,83,112)",
        "purple": "#c792ea",
        "violet": "#BB80B3",
        "yellow": "#ffcb6b",
        "orange": "#f78c6c",
        "orange2": "#FF9800",
        "cyan": " #89ddff",
        "white": "#eeffff",
        "red2": "#ff5370",
        "gray": "#546e7a",
        "brown": "#AB7967"
    },
    "rules":
    [
        {"scope": "tal.opcode.stack", "foreground": "var(red)", "font_style": "italic bold"},
        {"scope": "tal.opcode.memory", "foreground": "var(red)", "font_style": "italic bold"},
        {"scope": "tal.opcode.logic", "foreground": "var(red)", "font_style": "italic bold"},
        {"scope": "tal.opcode.arithmetic", "foreground": "var(red)", "font_style": "italic bold"},
       
        {"scope": "tal.label", "foreground": "var(blue)", "font_style": "bold"},
        {"scope": "tal.sublabel", "foreground": "var(cyan)", "font_style": "bold"},

        {"scope": "tal.addressing.zero-page", "foreground": "var(orange)", "font_style": "italic"},
        {"scope": "tal.addressing.absolute", "foreground": "var(purple)", "font_style": "italic"},
        {"scope": "tal.addressing.relative", "foreground": "var(violet)", "font_style": "italic"},
        {"scope": "tal.addressing.raw", "foreground": "var(aqua)", "font_style": "italic"},
        
        {"scope": "tal.padding.absolute", "foreground": "var(pink)", "font_style": "bold"},
        {"scope": "tal.padding.relative", "foreground": "var(pink)", "font_style": "bold"},

        {"scope": "tal.number.short.raw", "foreground": "var(orange2)"},
        {"scope": "tal.number.short.literal", "foreground": "var(yellow)"},
        {"scope": "tal.number.byte.raw", "foreground": "var(orange2)"},
        {"scope": "tal.number.byte.literal", "foreground": "var(yellow)"},

        {"scope": "tal.string", "foreground": "var(green)"},
        {"scope": "tal.comment", "foreground": "var(gray)"},
        {"scope": "tal.include", "foreground": "var(brown)", "font_style": "underline"},
        {"scope": "tal.delimiter", "foreground": "var(pale_blue)"},

        {"scope": "tal.macro.definition", "foreground": "var(white)"},
        {"scope": "tal.macro.delimiter", "foreground": "var(white)"},
        {"scope": "tal.macro.invocation", "foreground": "var(white)"}
    ]
}

tal.sublime-syntax

%YAML 1.2
---
# See http://www.sublimetext.com/docs/3/syntax.html
name: Uxntal Material Syntax Definition
scopeName: tal.
fileTypes: [tal]
file_extensions:
  - tal
scope: source.tal

contexts:
  main:
    - include: comments
    - include: single_quoted_string
    # OPCODES
    # stack
    - match: '\s*BRK2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.stack
      pop: true
    - match: '\s*INC2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.stack
      pop: true
    - match: '\s*LIT2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.stack
      pop: true
    - match: '\s*POP2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.stack
      pop: true
    - match: '\s*NIP2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.stack
      pop: true
    - match: '\s*SWP2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.stack
      pop: true
    - match: '\s*ROT2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.stack
      pop: true
    - match: '\s*DUP2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.stack
      pop: true
    - match: '\s*OVR2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.stack
      pop: true

    # memory
    - match: '\s*LDZ2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.memory
      pop: true
    - match: '\s*STZ2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.memory
      pop: true
    - match: '\s*LDR2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.memory
      pop: true
    - match: '\s*STR2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.memory
      pop: true
    - match: '\s*LDA2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.memory
      pop: true
    - match: '\s*STA2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.memory
      pop: true
    - match: '\s*DEI2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.memory
      pop: true
    - match: '\s*DEO2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.memory
      pop: true

    # logic
    - match: '\s*EQU2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.logic
      pop: true
    - match: '\s*NEQ2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.logic
      pop: true
    - match: '\s*GTH2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.logic
      pop: true
    - match: '\s*LTH2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.logic
      pop: true
    - match: '\s*JMP2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.logic
      pop: true
    - match: '\s*JCN2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.logic
      pop: true
    - match: '\s*JSR2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.logic
      pop: true
    - match: '\s*STH2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.logic
      pop: true

    # arithmetic
    - match: '\s*ADD2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.arithmetic
      pop: true
    - match: '\s*SUB2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.arithmetic
      pop: true
    - match: '\s*MUL2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.arithmetic
      pop: true
    - match: '\s*DIV2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.arithmetic
      pop: true
    - match: '\s*AND2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.arithmetic
      pop: true
    - match: '\s*ORA2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.arithmetic
      pop: true
    - match: '\s*EOR2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.arithmetic
      pop: true
    - match: '\s*SFT2?r?k?r?2?r?k?\s+'
      scope: tal.opcode.arithmetic
      pop: true


    # label
    - match: '\s*\@(\S+)'
      scope: tal.label
      pop: true
    # sublabel
    - match: '\s*\&(\S+)'
      scope: tal.sublabel
      pop: true
    # include
    - match: '\s*~(\S+)'
      scope: tal.include
      pop: true

    # padding
    - match: '\s*\$(\S+)'
      scope: tal.padding.relative
      pop: true

    - match: '\s*\|(\S+)'
      scope: tal.padding.absolute
      pop: true


    # Addressing
    - match: '\s*\.(\S+\/?\S+)'     # zero-page
      scope: tal.addressing.zero-page
      pop: true
    - match: '\s*\,(\S+\/?\S+)'     # relative
      scope: tal.addressing.relative
      pop: true
    - match: '\s*\;(\S+\/?\S+)'     # absolute
      scope: tal.addressing.absolute
      pop: true
    - match: '\s*\:(\S+\/?\S+)'     # raw
      scope: tal.addressing.raw
      pop: true

    # macros
    - match: '\s*%\S+'
      scope: tal.macro.definition
      pop: true


      # blocks
    - match: '\s*\{\s+'
      scope: tal.macro.delimiter
      pop: true
    - match: '\s*%\s+'
      scope: invalid
      pop: true
    - match: '\s*:\s+'
      scope: invalid
      pop: true
    - match: '\s*,\s+'
      scope: invalid
      pop: true
    - match: '\s*@\s+'
      scope: invalid
      pop: true
    - match: '\s*#\s+'
      scope: invalid
      pop: true
    - match: '\s*\}\s+'
      scope: tal.macro.delimiter
      pop: true
    - match: '\S+\}\S*'
      scope: invalid
      pop: true

    - match: '\s*\[\s+'
      scope: tal.delimiter
      pop: true
    - match: '\S*\[\S+'
      scope: invalid
      pop: true
    - match: '\s*\]\s+'
      scope: tal.delimiter
      pop: true
    - match: '\S+\]\S*'
      scope: invalid
      pop: true


    # numbers
    - match: '\s*[0-9|a-f]{4}\s+'
      scope: tal.number.short.raw
      pop: true

    - match: '\s*[0-9|a-f]{2}\s+'
      scope: tal.number.byte.raw
      pop: true

    - match: '\s*#[0-9|a-f]{4}\s+'
      scope: tal.number.short.literal
      pop: true

    - match: '\s*#[0-9|a-f]{2}\s+'
      scope: tal.number.byte.literal
      pop: true

    # strings
    - match: '\s*(\"\S+)\s+'
      scope: tal.string
      pop: true
    - match: '\S*(\"\S+)\S+'
      pop: true
      scope: invalid
    - match: "'"
      scope: deprecated
      push: single_quoted_string
      pop: true
    # macro invocation
    - match: '[^\#]+?'
      scope: macro.invocation
      pop: true


  comment:
    - match: '\s*\('
      scope: tal.comment
      push:
        - meta_scope: tal.comment
        - match: '\)\s+'
          pop: true
        - include: comment-nested

  comment-nested:
    - match: '\('
      scope: tal.comment
      push:
        - meta_scope: tal.comment
        - match: '\)'
          pop: true
        - include: comment-nested

  comments:
      - include: comment
      - include: comment-nested

  single_quoted_string:
    - meta_scope: deprecated
    - match: '\\.'
      scope: deprecated
    - match: "'"
      scope: deprecated
      pop: true

Instructions

1. Install Material Theme.
2. Save tal.sublime-syntax in Sublime Text Packages directory.
3. Save Material-Theme.sublime-color-scheme in Packages/Material Theme/schemes.
4. Add this to the user Preferences.sublime-settings configuration file:

{
...
    "theme": "Material-Theme.sublime-theme",
    "color_scheme": "Packages/Material Theme/schemes/Material-Theme.tmTheme",
...
}