Elisha plus old KM lens have really nice colors.. at least your pictures made by Sony A700 have them. Now your pics have sometimes tiny bit of green tint. But I guess nobody with sRGB monitor will see that, which means most ppl. Btw. great portrait as usually..

hale88 Hard to say, what about some EXIF? It can be caused by camera, high ISO or out-of-camera JPEG.