My view so far is roughly speaking naturalist/pragmatic in the sense that we figure out which values are truly objective in the same way as we would figure this out about any other issue. Maybe it's more about the stance towards a specific value. We sometimes speak of specific values in strongly realist ways. Whether we're right or wrong about this is a matter of nature, and, if you want to put it in these terms, concerns value epistemology. Although I'm sympathetic with error theory as a critique, I find it overall not very credible as a statement about all value.