[hero] Switching to dark mode doesn't change the gradient colour

[hacketiwack]

This is a question related to the hero styling.
Is there a possibility to adapt the hero styling when switching from light to dark mode?

For example, if I have the following:

  <section class="hero is-light is-bold">
    <div class="hero-body">
      <div class="container">
        <p>content</p>
      </div>
    </div>
  </section>

The hero section gets a gradient because of is-bold associated with is-light.
However, switching to dark mode, doesn't change the colours of the gradient.
In dark mode, the colour of the gradient should be like if we had class="hero is-dark is-bold".

Any help is appreciated as I didn't find anything regarding the hero gradient in the documentation.
Is it a deprecated feature?

Thanks