While you might be experiencing a color management issue (I can’t say without seeing your before/after photos), your problem might as well be unrelated to color profiles, as there is another issue which affects every uploaded photo. Facebook re-encodes all uploaded images using chroma subsampling and high compression which obliterate all the effort we put into our work. This affects photos with fine color detail more than others. The only solution is to upload your images elsewhere and link them on Facebook.
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