SOURCE

<p class="p_0">background-origin：默认为 padding-box</p>
<p class="p_1">background-origin：padding-box</p>
<p class="p_2">background-origin：border-box</p>
<p class="p_3">background-origin：content-box</p>

p{
    height: 50px;
    margin-top: 10px;
    padding: 10px;
    border: 10px solid rgba(10,10,10,.2);
    background-color: yellowgreen;
    background-repeat: no-repeat;
}
.p_1{
    background-clip: padding-box;
}
.p_2{
    background-clip: border-box;
}
.p_3{
    background-clip: content-box;
}