<div>
Your rule trys to traget the anchor inside element with .service class what is the img when there's no anchor inside it, it must be : 
 

<pre><code class="code-1 nolinks" id="code-20-42741809-1">#hap-wrapper a:hover {
 transition: background-color .3s ease;
 background-color: #9f9145;
}
</code></pre>
 
Or you could attach the rules directly to the image like : 
 

<pre><code class="code-1 nolinks" id="code-20-42741809-2">.service:hover{
 filter: brightness(110%); 
}
</code></pre>
</div>

<div>
I tried both and neither worked.
</div>

<div>
Try this 
 

<pre><code class="code-1 nolinks" id="code-20-42742011-1">.service:hover {
	opacity: 0.5;
}
</code></pre>
</div>

<div>
I have already tested on your website the following rule and it works just fine: 
 

<pre><code class="code-1 nolinks" id="code-20-42742071-1">.service:hover{
 filter: brightness(110%); 
}
</code></pre>
 
I suggest also to give the items with class service a low opacity as 0.5 for example then toggle it to 1 on hover, something like : 
 

<pre><code class="code-1 nolinks" id="code-20-42742071-2">.service {
 display: block;
 padding-bottom: 10px;
 margin-right: auto;
 margin-left: auto;
 max-width: 180px;
 opacity: 0.5;
}
</code></pre>
 
Then on hover : 
 

<pre><code class="code-1 nolinks" id="code-20-42742071-3">.service:hover{
 opacity: 1; 
}
</code></pre>
 
<a href="http://g.recordit.co/fxPTaH3vwz.gif" rel="ugc">LIVE EXAMPLE</a> 
<a href="https://filedb.experts-exchange.com/incoming/2018/11_w48/1404514/fxPTaH3vwz.gif" target="_blank" class="file-inline" title="LIVE test (816 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>fxPTaH3vwz.gif</a>
</div>

fxPTaH3vwz.gif

<div>
Okay these work. &nbsp;However I was aiming for something like this..... where the entire background becomes lighter. 
 
<a href="https://islandrecs.lnk.to/Sober" rel="ugc">https://islandrecs.lnk.to/Sober</a>
</div>

David Schure

<div>
Yes these work. &nbsp;Is there a way to exclude the picture and the song info from the mix? 
 

<pre><code class="code-1 nolinks" id="code-20-42742378-1">&lt;div id=&quot;highlight&quot;&gt;
 	&lt;a href=&quot;&quot;&gt;
 &lt;img src =&quot;socials\music-service_amazon.svg&quot; class=&quot;service&quot;&gt;
 &lt;/a&gt;
 &lt;!--div class=&quot;play&quot;&gt;Download&lt;/div--&gt;
&lt;/div&gt;
</code></pre>
 

<pre><code class="code-1 nolinks" id="code-20-42742378-2">#highlight div:hover {
 transition: background-color .3s ease;
 background-color: #9f9145;
}
</code></pre>
 
I tried naming the div's containing the music services and adding the code to it but it did nothing.
</div>

<div>
Check my the previous comment covering that using :not(:first-child) selector.
</div>

<div>
That turned out weird....it selected almost everything..... 
 

<pre><code class="code-1 nolinks" id="code-20-42742389-1">#hap-wrapper&gt;div:not(:first-child){
 transition: background-color .3s ease;
 background-color: #9f9145;
}
</code></pre>
</div>

<div>
This worked. 

<pre><code class="code-1 nolinks" id="code-20-42742393-1">#hap-wrapper&gt;div:not(:first-child):hover{
 transition: background-color .3s ease;
 background-color: #9f9145;
}
</code></pre>
</div>

<div>
Yes my bad sorry, I have just missed the :hover
</div>

<div>
Thanks to the both of you. &nbsp;This really helped me and I learned a lot!
</div>

<div>
<div class="content wysiwyg-content">
I would like to make the background lighter on hover. &nbsp;What I have is not working. Its on the streaming services. &nbsp;Amazon, etc. 
<a href="http://mediascrubber.com/index.html" rel="ugc">http://mediascrubber.com/index.html</a> 
 

<pre><code class="code-1 nolinks" id="code-10-29127291-1">&lt;div&gt;
 	&lt;a href=&quot;&quot;&gt;
 &lt;img src =&quot;socials\music-service_amazon.svg&quot; class=&quot;service&quot;&gt;
 &lt;/a&gt;
&lt;/div&gt;
</code></pre>
 

<pre><code class="code-1 nolinks" id="code-10-29127291-2">.service a:hover {
	transition: background-color .3s ease;
 background-color: #9f9145;
	}
</code></pre>
</div>
</div>

I would like to make the background lighter on hover.  What I have is not working. Its on the streaming services.  Amazon, etc.
http://mediascrubber.com/index.html

(CODE)

(CODE)

Changing background on hover.

Cascading Style Sheets (CSS) is a language used for describing the look and formatting of a document written in a markup language. Usually used to change web pages and user interfaces written in HTML, it can also be applied to any kind of XML document. CSS is designed primarily to distinguish the content of a document from its presentation.