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An extension for Store Builder and Multi-Vendor that decides how the administration panel looks before anyone logs in. The dark theme has been part of the panel since version 4.18.2, but the choice belongs to each user and lives in their profile, so it only takes effect after login. The screen that everyone sees first, the login form, stays bright at all times. This add-on hands the panel the missing value straight from the store configuration.
Key Features
- Three variants to choose from. Dark, light, or following the theme configured in the operating system of the person who has just opened the page. The last one keeps the panel in step with a computer that turns dark in the evening.

Screenshot 1
- Every screen available before login. The setting covers the login form, the password recovery screen and the screen where a new password is set, so the whole way back into the panel looks the same.

Screenshot 2
- The vendor panel included. In Multi-Vendor the same setting applies to the panel used by vendors, with no separate configuration to fill in.
- Nothing changes after login. From the moment someone signs in, the preference saved in their profile takes over again. The add-on does not touch it and overrides nobody's choice.
- One setting, nothing to learn. A single field in the add-on configuration, left by default on the operating system variant. No templates, no styles and no database tables of its own.
Good to know
- CS-Cart or Multi-Vendor 4.18.2 or newer. That release introduced the dark panel theme in both editions at once, and the add-on leans on the machinery already present in the core. On older stores the core itself stops the installation.
- It uses the core, it does not replace it. The add-on supplies the colour scheme value that the panel templates already know how to read, which is why it goes through upgrades without any work on your side.
A bright login form in an otherwise dark panel is a small thing, and everyone working in the evening notices it anyway. This add-on takes it off the table, free of charge.

Screenshot 3
Feel free to download the add-on and write to us if you need a hand.
- Store Builder
- Store Builder Plus
- Store Builder Ultimate
- Multi-Vendor
- Multi-Vendor Plus
- Multi-Vendor Ultimate
- 4.21.1
- 4.20.1
- 4.19.1.SP2
- 4.19.1.SP1
- 4.19.1
- 4.18.4
- 4.18.3
- 4.18.2.SP1
- 4.18.2
- English
- Polska
Contact information

SoftSolid has been an official CS-Cart developer since February 2010. We build add-ons that a store owner can set up without calling a developer: clear settings, sensible defaults and documentation. Every add-on is kept compatible with new CS-Cart releases.
2010 official CS-Cart developer since | 160+ add-ons in this marketplace |
5.0 average rating from 90+ reviews | 29 add-ons also on a low monthly subscription |
What we do for CS-Cart and Multi-Vendor stores
Beyond ready add-ons, we take on almost any development work for CS-Cart, Store Builder and Multi-Vendor:
Custom add-on development New features for your store built as separate, update-safe add-ons, from a small admin tool to a complete module. | |
Changes to existing functionality Checkout, product pages, promotions, orders, admin panel and vendor panel adjusted to the way your business works. | |
Integrations ERP and accounting systems, marketplaces and order management, couriers and parcel lockers, payment gateways, and any service with an API or data feed. | |
Multi-Vendor marketplaces Vendor plans, commissions, payouts, vendor permissions and tools that make running a marketplace easier. | |
Upgrades and migrations CS-Cart and Multi-Vendor upgrades to new versions, moving data from other platforms, imports and exports. | |
Performance and security Store audits, finding and removing malicious code, speed and server configuration. | |
AI and automation AI chat assistants trained on your store content, automatic translations and automation of repetitive work. | |
Support and maintenance Ongoing care of your store, fixes and keeping custom code compatible with new CS-Cart releases. | |
Turnkey stores A complete CS-Cart or Multi-Vendor store set up on a ready theme: configuration, add-ons, integrations, data import and launch. | |
Mobile applications Mobile apps for your store or marketplace, connected to your CS-Cart data. |
Our flagship add-ons
![]() | Base.com (BaseLinker) integration Exchange orders and products between your store and Base.com, and sell on marketplaces from one place. |
![]() | DeepL translations Translate products, categories, pages and menus into every language of your store: one click, in bulk or automatically. |
![]() | AI Agent / Chat Bot (RAG) An AI assistant that answers your customers using the real content of your store. |
![]() | Promotions for vendors Promotions with vendor conditions on Multi-Vendor, and vendors can create promotions of their own. |
Why merchants choose us
- Direct contact with the developer team, no ticket queue
- Add-ons for integrations, shipping, payments, ERP, AI and Multi-Vendor vendor tools
- One team for ready add-ons and custom work, since 2010
- Buy for $200 or more from our offer and get a 20% discount
Tell us what your store needs to do. We will point you to the add-on that already does it, or build a solution for your case.
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Make purchases for 200$ from our entire offer and get 20% discount
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