What it does
Two skills in one plugin. One is about using UI theme designer on BTP; the other answers questions about the SAP Design System and the Fiori design tokens, including parameter inheritance and which theming parameters specific UI components use. That last fact is the one a colour change rests on and the one a control's public API does not state, which is why it sits here rather than in the guidelines skill.
Remaining work
Install it as a plugin in Claude Code or GitHub Copilot, each with its own command, or through the skills command line. Nothing in it compiles or deploys a theme, and it states no UI5 flavor, so whether its parameter mapping reaches the Web Components library as well as SAPUI5 controls was not established.