Orange

#FFA500

rgb(255, 165, 0)

hsl(39, 100%, 50%)

.element {
  background-color: #FFA500;
  color: #FFA500;
  border: 1px solid #FFA500;
}

.element {
  background-color: rgb(255, 165, 0);
  color: rgb(255, 165, 0);
}

.element {
  background-color: hsl(39, 100%, 50%);
  color: hsl(39, 100%, 50%);
}

<div style="background-color: #FFA500; color: white;">
  Content
</div>

element.style.backgroundColor = "#FFA500";
element.style.color = "#FFA500";

<div style={{ backgroundColor: "#FFA500", color: "white" }}>
  Content
</div>