TUI Image Theme Editor

This tool enables the creation and validation of themes for a text-based image editor (TUI). It targets developers and UX researchers building CLI image tools who require consistent color palettes, typography tokens, and accessible contrast across terminal color spaces. The system enforces domain rules, supports palette harmonization, and outputs export-ready configurations. The approach is data-focused, emphasizing token names, color roles, and format compatibility over visual UI rendering.\n\nCore capabilities include collecting theme inputs (base palette, background, foreground, font tokens) and applying terminal-space considerations (16-, 88-, 256-color, and true color). It checks contrast against target ratios, suggests harmonious variants, and maps colors to semantic tokens (background, surface, text, accent). Output formats include JSON, YAML, and TOML, with options for multi-theme exports to support batch workflows.\n\nAudience benefits come from reduced design-implementation drift, faster CI integration, and consistent look-and-feel across terminal applications. The tool's value lies in domain-aware validation (contrast, color space mapping) and deterministic exports that can be consumed by code generators or theme loaders in CLI projects. The unique differentiator is its explicit emphasis on TUI color spaces and semantic token mapping, not generic color pickers. Use cases include integrating with terminal-based image editors, building consistent theme libraries, and validating accessibility early in the design cycle.