XF 2.2 How to change the background of Similar Threads block without affecting thread list?

[gogo]

For example, if I added the following code:

.structItemContainer {
    background: red;
}

The Similar Threads will become this:



But the color change also affect Thread List block.

How do I specify it to Similar Threads only? I can't seem to find a tag in code for similar threads..

 

[Paul B]

Which site is this for?

 

[gogo]

Which site is this for?

My own site. The example picture above is modified from xenforo.com's forum (Chrome Inspect).

 

[gogo]

I found I could do this by the following code:

[data-widget-definition="xfes_similar_threads"] .block-container {
    background: red;
}

 

[Paul B]

You don't have an XFES license for the customer account this forum account is associated with.

Can you clarify which site it is for?