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Using @contentBackground in external PHP script


Well-known member

I'm creating an add-on which uses an external PHP script, the script is being called by XenForo in an iFrame. The script has its own CSS where I define the following:

.wrapper {
    margin: 0 auto;
    padding: 1em 2em;
    display: inline-block;
    background-color: @contentBackground;
    border: 1px solid @primaryMedium;
    border-radius: 5px;
The @contentBackground works properly, however the @primaryMedium does not. Can someone please explain why only the @contentBackground is working.

Thank you.
Last edited: