Colors were created using XnView:

Greyscale => Copper:			R+0		G-64	B-255
Greyscale => Silver:			R+32	G+32	B+32
Greyscale => Gold:				R+0		G-16	B-255
Greyscale => Mithril:			R+0		G+16	B+32
Greyscale => Adamantite:	R-120 G-128 B-112

Sickness/Blight: Contrast -64

Dry/Wet Farmland => Fertilized: 	BR-8	CON-16	R-28	G-16	B-16

