config menu does not display color pickers

In MediaWiki 1.43, the color pickers are not working

<img width="416" height="379" alt="Image" src="https://github.com/user-attachments/assets/7d3ff736-70fe-4871-b4a4-15530cfa65c0" />

there should be color pickers: https://www.mediawiki.org/wiki/Extension:KnowledgeGraph#/media/File:ScreenshotKnowledgeGraphPropertiesSettings.png