If it’s yellowish, then it’s yellowish, not white - if we’re talking what can be spectrographically measured. If we’re talking about perception then it gets rather interesting with the way our eyes/brain compensate for light sources - see white balance on cameras, or that green/gold/blue/white dress controversy.

By your definition, there have never been any genocides. Jewish people still exist.

Isn’t ketchup pretty much just red sugar gel?