Dark Twenty-One Side-Menu Theme

Dark Twenty-One Side-Menu Theme

Developed By WebsiteIntegrations

Compatible with WHMCS v8.6

This is a Dark Version of our Twenty-One Side-Menu Client Theme that is included with WHMCS.

It is perfect for those websites using a darker design and want a client area that is also dark. It is 100% compatible with the latest version and works as a child theme to the twenty-one style so it is easy to keep updated.

The main difference in this theme compared to the standard twenty-one theme is that the whmcs navigation is moved to the sidebar. The original whmcs sidebar is then moved to the right side of the content area. The navigation sidebar and header are fixed while the whmcs content area scrolls.

It also includes a dark version of a modified Standard Cart orderform which moved the original sidebar to the right side.


  • Download the theme from our website.
  • Upload to your WHMCS template folder and unzip
  • From the WHMCS admin settings just select the twenty-one-sidemenu-dark theme and also the sidemenu-cart-dark orderform

That's it! You're good to go.


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Version Compatibility

Compatible with WHMCS v8.6

Full Version Compatibility

  • Selected versions of WHMCS v8.6
  • Selected versions of WHMCS v8.5
        8.5.0 - 8.5.1
  • Selected versions of WHMCS v8.4

Support for this product

The best place to start if you need help with a specific product is to contact the developer. All WHMCS Marketplace developers have both a website and support URL listed.

Developed By WebsiteIntegrations


v2 Released June 10th, 2022

Latest Version

  • Updated for WHMCS 8.5


Previous Versions

v1 Released March 2nd, 2022

View/hide detailed changelog

Initial Release


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