New Tamiya colors?

I was out of town the past several days and visited a hobby shop where I was staying. I found several "new", to me anyways, Tamiya Acylic colors. The JGSDF  brown (XF-72) is self explanatory, but I also say a "royal gray"(XF-80),  "IJN Gray Green"(XF-76), "Kure Gray" (XF-75), and a "Linoleum Deck Brown"(XF-79). I presume the last two colors are for IJN ships, but is the IJN Gray Green supposed to be the much debated "Amiero"? And is the "Royal Gray" a Royal Navy color? Tamiya's website is not much help.