change the color of placeholder when you select any value

Question

i am also using pseudo class "option:checked" its not working ,when we select any value its color changes gray to black its ok but when you defocus the select field this color should black and initially placeholder should be gray.

<select>
    <option value="" hidden selected>Choose any...</option>
    <option>developer</option>
    <option>tester</option>
</select>

css also attached

 select {
  color: gray;
 }
 option{
  color:black;
 }
 select:focus{
  color: black;
 }

this developer color should be black color after selection of option