There is a code:
.background { background-color: red; opacity: 0.3; } <div id="test"> <div id="test2"> <div class="test3"> <div class='background'> <span class="test4">lorumsukaipsum</span><span class="test5">ipsumblya</span> </div> </div> </div> </div> How can I set opacity: 0.1 for class background without changing the transparency of the text?