Sentence:  Mr. Moore has this year a dangerous rival in a little known artist, Mr. thomas Somerscales, who sends a seascape "Corvette shortening sail to pick up a ship-wrecked crow", in which the heavy bosom of the ocean, dark azure under a serene evening sky freed from  the clouds which, <WSD>rose-tinted</WSD> by the sunset, are just sinking below the horizon, is presented in unsurpassable fashion. 
Meaning of the word marked with <WSD> tags:  To tint with the color rose; to suffuse with a rosy hue.