我无法通过按钮更改SVG的颜色。我希望将鼠标悬停在带有SVG的按钮上时SVG颜色改变，现在当我将鼠标悬停在该按钮内的SVG图像上时，它才起作用。这是到目前为止我得到的：
.round {
display: inline-block;
width: 120px;
line-height:118px;
background-color: rgba(100,100,0);
border:2px solid #0090ff;
-webkit-border-radius: 200px;
-moz-border-radius: 200px;
border-radius: 200px;
cursor:pointer;
-webkit-transition: all .2s ease-out;
-moz-transition: all .2s ease-out;
}
.round:hover {
background-color: #00aaee;
border:2px solid #0080b3;
}
.svg:hover {
filter: brightness(1000%) saturate(0%) contrast(1000%);
}<a href="/category/aktualnosci/" class="round"><img class="svg" src="/wp-content/uploads/2019/12/gazeta.svg" width="60" height="60"></a><br>