SimpleGrey - Clean General-Purpose Theme for OpenCart 4.1+

A neutral, fast-loading storefront for hospitality suppliers, hotel buyers, restaurant procurement, B&B owners, facility managers — and any catalog that values quiet typography and a calm browse.
Light grey palette, sharp corners, red sale badges. PHP 8.x ready. Most of the content is in the demo to keep the design clean, no bloatware extensions, high compatibility with opencart core.
Contact us ("get support") if you want improvements or need fixes.


What's included

• OpenCart 4.1.0.0+ theme extension (.ocmod.zip), installable via Marketplace > Installer.
  
• Editable color palette — Primary, Accent, Warm, Cool, Paper, Cream, Ink, three background stops, and corner radius — all from the admin panel to have a fresh predefined palette of your custom one.
  
• Demo content installer — One-click "Simple Demo" (gallery only) or "Full Demo" (14 hospitality products, 14 categories with two-level hierarchy, 5 manufacturers, 4 HTML modules wired into the home layout). Idempotent — install / remove / re-install as many times as you like.
  
• Event-driven, zero core modifications — Replaces output via OpenCart 4 event hooks.
  

Tech specs

• Compatibility: OpenCart 4.1.0.0 — 4.1.0.3 (4.1.x)
  
• PHP: 8.0 — 8.3
  
• Architecture: OpenCart 4 namespaced MVC + L (Model layer for all DB access)
  
• Activation: Standard OpenCart switch via System → Settings → Store → Theme
  
• No core file edits — Only the extension folder
  
• Twig templates — Customize without touching PHP
  
• Bootstrap 5 grid — Compatible with all standard OpenCart 4 modules
  

Install in three steps

1. Marketplace → Installer → upload the .ocmod.zip
   
2. Marketplace → Extensions → Themes → Install SimpleGrey
   
3. System → Settings → Store → set Theme = SimpleGrey → Save
   

Optional: open SimpleGrey Theme in Extensions → Themes and click Install Full Demo for the full storefront populated with hospitality products, categories, manufacturers, and a clean hospitality gallery.

Support

SimpleGrey — thinked for hospitality and supply catalogs but usable for any kind of store that wants a quiet, neutral, fast storefront.