From the marketplace:

1. On vscode, go to View -> Command Palette or press Ctrl+Shift+P;
2. Type Install Extension;
3. Then Type Wildberries;
4. Click on Set Color Theme;

Manually from VSIX:

1. Download the VSIX file found on this page;
2. On vscode, go to View -> Command Palette or press Ctrl+Shift+P;
3. Type Install from VSIX...;
4. Select the downloaded VSIX file to install it;

Activating the theme:

To activate and manage your themes at any time, go to your command palette and type Preferences: Color Theme.