create colour scheme tructure

README.md

@@ -90,6 +90,16 @@ Record every decision here with a short rationale. Append new entries; do not re
   - **Format**: Each color defined as `{hex, 256-color, ansi}` tuple for broad terminal compatibility
   - **Philosophy**: Light, paper-like theme with subtle colors for long reading sessions
   - **Next steps**: Phase 11.3 will create colorscheme structure and entry point
+- 2025-12-11: Colorscheme Phase 11.3:
+  - **Colorscheme structure**: Created complete modular colorscheme architecture
+  - **Entry point**: `colors/paper-tonic-modern.lua` properly resets and loads colorscheme
+  - **Main module**: `lua/paper-tonic-modern/init.lua` with helper functions for setting highlights
+  - **Helper functions**: `M.highlight()` for single groups, `M.highlight_all()` for batch operations
+  - **Color conversion**: Smart conversion between gui/cterm/ansi formats
+  - **Group modules**: Created stub files for editor, syntax, treesitter, semantic, lsp, and plugins
+  - **Loading order**: Structured to load groups in logical sequence (editor → syntax → treesitter → semantic → lsp → plugins)
+  - **Validation**: Colorscheme loads successfully, highlights applied correctly
+  - **Language color consistency**: All documentation updated to reflect that each language maintains its color identity everywhere (PHP=primary, HTML=blue, CSS=green, templates=magenta)
 
 ## Project-Local Configuration (design)