The Son of Santo and Blue Shadow

To blue shadows and purple woods.

Or is it purple woods and blue shadows, or what is it?

Away to the right at the head of the great dale the mighty Starkhorn loomed up above its vast buttresses swathed in cloud; but its jagged peak, clothed in everlasting snow, gleamed far above the world, blue-shadowed upon the East, red-stained by the sunset in the West.