I would like to change the blue focus color on outlined input fields. How do I do this?

Here is an example field that I am using:

<div class="form-outline">
    <input 
        type="text" 
        id="useraccount" 
        class="form-control" 
        value="
    >
    <label class="form-label" for="useraccount">Brugernavn</label>
    <div id="useraccount-validation" class="valid-feedback"></div>
</div>