How to change the color of the ::placeholder of an <input> element back to its default color

As you can see in the second input field which has no CSS applied to it, the default placeholder color (atleast for me on chrome) is grey. However, when I change the color back to "initial" (which should be its default color) on the first input field, it becomes black. I have also tried to use "unset", but that didnt work either. How can I make the color return to its default color???

.inp1::placeholder {
  color: red;
}
.inp1:hover::placeholder,
.inp1:focus::placeholder {
  color: initial;
}

<input class="inp1" type="text" placeholder="Search">

<input class="inp2" type="text" placeholder="Search">

>Solution :

This seems to be an issue with Chrome, Firefox behaves properly with keyword initial, you can use keyword revert

.inp1::placeholder {
  color: red;
}
.inp1:hover::placeholder,
.inp1:focus::placeholder {
  color: revert;
}

<input class="inp1" type="text" placeholder="Search">

<input class="inp2" type="text" placeholder="Search">