side-nav does not use the theme and is hardcoded to white

[treyhuffine]

I am trying to use Carbon in dark mode, and the side nav is hardcoded to white. Is this intended or should I send a PR to use background of the chosen theme?

https://github.com/carbon-design-system/carbon/blob/master/packages/components/src/components/ui-shell/_theme.scss#L156

Applying the dark theme using the following feels like an unintentional bug for the UI.

@import '@carbon/themes/scss/themes';
$carbon--theme: $carbon--theme--g100;
@include carbon--theme();

@import 'carbon-components/scss/globals/scss/styles.scss';

[joshblack]

Hi there! 👋 It's currently not possible to theme the UI Shell, however we have an open issue to revisit our usage of private tokens here to allow for theming: #4839

I'm going to close this for now and point folks over to that feature issue for theming UI Shell. Hope this helps!