Global types added to the toolbar are illegible when using OSX dark theme

Describe the bug A clear and concise description of what the bug is. The dropdown menu on the global types that are defined in the menu is displayed with black text on a black background when using a Mac with dark theme.

To Reproduce Steps to reproduce the behavior:

1. Install the Storybook a11y add-on or define a global type
2. Set Mac to dark theme
3. Click on one of the menus in the toolbar
4. See that you cannot read anything

Expected behavior A clear and concise description of what you expected to happen.

The menu should not change background color when dark theme is set, or at least the text should also change color.

Screenshots If applicable, add screenshots to help explain your problem.

This one struck me as particularly ironic:

Code snippets If applicable, add code samples to help explain your problem.

System Please paste the results of npx sb@next info here.

% npx sb@next info

Environment Info:

  System:
    OS: macOS 10.15.7
    CPU: (8) x64 Intel(R) Core(TM) i7-7820HQ CPU @ 2.90GHz
  Binaries:
    Node: 12.21.0 - /usr/local/opt/node@12/bin/node
    Yarn: 1.22.4 - /usr/local/bin/yarn
    npm: 6.14.11 - /usr/local/opt/node@12/bin/npm
  Browsers:
    Chrome: 89.0.4389.114
    Safari: 13.1.3
  npmPackages:
    @storybook/addon-a11y: 6.2.2 => 6.2.2 
    @storybook/addon-actions: 6.2.2 => 6.2.2 
    @storybook/addon-essentials: 6.2.2 => 6.2.2 
    @storybook/addon-knobs: 6.2.2 => 6.2.2 
    @storybook/addon-links: 6.2.2 => 6.2.2 
    @storybook/addon-postcss: ^2.0.0 => 2.0.0 
    @storybook/addon-storysource: 6.2.2 => 6.2.2 
    @storybook/addons: 6.2.2 => 6.2.2 
    @storybook/react: 6.2.2 => 6.2.2 
    @storybook/source-loader: 6.2.2 => 6.2.2 
    @storybook/storybook-deployer: ^2.8.7 => 2.8.7 
    @storybook/theming: 6.2.2 => 6.2.2 

Additional context Add any other context about the problem here.

[blankwavearcade]

Hi, I’d like to work this issue.

[randak]

We traced this down to an incompatibility outside of the core Storybook project, so I’ll close this issue.