I certainly did.

1. Click on Record macro
2. Press ctrl+h (set user defined RGB values: more -> format -> font -> ... )
3. Press "cancel" to exit the find & replace pane (else the recording can't be terminated)
4. Click on Stop Recording
5. Run the created macro (but nothing happens).

FYI, the macro recording can't be terminated without pressing the cancel button, which is the real problem here. The "find what" and "replace with" fields should be left clear of course, in order to emulate the generic ctrl+h function. I don't want the macro to limit the find & replace function to a specific search text, which then would be no-brainer.