TPG meaning is Textile Paper Green. This is the paper version of the Cotton TCX colours in the Pantone Fashion, Home +Interiors range.
The suffix changed from TPX to TPG in 2016 because Pantone had to prove to the EU governments that they had removed banned chemicals from the coating process. All lead pigments and chromium have been removed to ensure compliance with environmental requirements.
TPG colours are found in the Paper Traveler, Color Guide, Color Specifier and as individual TPG sheets.