How in coloris to change theme into Circular thumbnail?

Using latest version of coloris( https://coloris.js.org/ ) in php8 / bootstrap 5.1.3 / jquery 3.6.1 app
and looking at examples at https://coloris.js.org/examples.html page I need to make component with
Circular thumbnail theme :

<input type="text" id="accent_color" name="accent_color"
    class="form-control"
    value="{{ $accentColor }}" data-coloris>

and I try to change theme of the component with code :

 <script src="/js/coloris.min.js"></script>

<script>
    $(document).ready(function() {
        Coloris.setInstance('.accent_color', { theme: 'polaroid', themeMode: 'dark',   alpha: true });
        ...

After that code dark themeMode is applied, but not theme – it is still default :

enter image description here

!

Which is the correct way to assign Circular thumbnail theme ?