Rendering Reference — Monospace Design TUI

This companion document to the Design Standard provides the exact character codes, escape sequences, color mappings, and component measurements needed to implement compliant Monospace TUI applications. Where the standard says what to do, this reference says how — down to the Unicode codepoint and SGR parameter.

Start Here

If you are choosing the visual system for a Mono TUI implementation, start with these reference plates:

§R3 256-Color Palette — semantic roles, named palettes, and rendered palette examples
§R4 Component Measurements — exact character-cell sizing rules
§R1 Box-Drawing Characters — borders, indicators, and shading glyphs
§R5 Shadow Rendering — shadow algorithm and scrim treatment for dialogs and modals

Sections

§R1 Box-Drawing Characters — Unicode codepoints for single-line, double-line, heavy, rounded, dashed, block, and indicator characters
§R2 SGR Codes — Select Graphic Rendition codes for text styling, typography roles, and state rendering
§R3 256-Color Palette — Palette structure, semantic role mappings, status colors, and seven named palettes with examples
§R4 Component Measurements — Exact character-cell dimensions for buttons, entry fields, toggles, radio groups, lists, tables, dialogs, menus
§R5 Shadow Rendering — Shadow algorithm, shadow cell attributes, and scrim rendering for modal overlays
§R6 Braille Sparkline Encoding — Braille pattern block, dot-to-bit mapping, sparkline construction, progress bar encoding
§R7 Color Capability Detection — Detection algorithm and graceful degradation table for terminal color capabilities
§R8 Escape Sequence Quick Reference — Cursor movement, scrolling regions, screen operations, and mouse tracking sequences
§R9 Mixed Border Junctions — Junction characters for connecting single-line and double-line borders