Faça alguns CSs usando JS no seletor
let myElement = document.querySelector("#superman");
myElement.style.backgroundColor = "#D93600";
Condemned Cobra
let myElement = document.querySelector("#superman");
myElement.style.backgroundColor = "#D93600";<!-- The second value will be selected initially -->
<select name="select">
<option value="value1">Value 1</option>
<option value="value2" selected>Value 2</option>
<option value="value3">Value 3</option>
</select>