Here is the Mr. Hobby (ex Gunze Sangyo) color chart and the conversion chart to other paint brands (Tamiya, Humbrol, Revell, Testors).
Mr Color Paint Gray FS16440 10ml # C315, GSi-C-315
Hobby Color Converter - Apps on Google Play
By Manufacturer - By Manufacturer (G-L) - Gunze Sangyo / Mr Hobby
Paint Colour Chart - Gunze Mr Hobby - 12 mm
OMG Oh My Gundam Paint Mr Hobby Mr Color C131 - C175
Mr.Color Model Paint: Semi-Gloss Dark Gray(2)
Revell color chart and conversion chart
mr.hobby color conversion chart
* SURFACE SHIPPING ONLY (US Customers) - This item can only be shipped via surface/ground shipping. Purchasing this item will result in your entire
GUNWC01 Gunze Sangyo Mr Weathering Color - Black 40ml
OMG Oh My Gundam Paint Mr Hobby Mr Color C301 - C315