<p class="one">Theo tên Màu</p>
<p class="two">HEX</p>
<p class="three">RBG</p>
<p class="four">HLS</p>
<p class="five">Trong suốt</p>
p.one {
border-style: solid;
border-color: red;
}
p.two {
border-style: solid;
border-color: #fff000;
}
p.three {
border-style: solid;
border-color: rgb(40, 28, 95);
}
p.four {
border-style: solid;
border-color: hsl(0,50%,70%);
}
p.five {
border-style: solid;
border-color: transparent;
}
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