Orange and shades on either side of orange dominate the Friz Freleng cartoon “Crows’ Feat” (1961). And since we’re into the 1960s, stylisation is the key. Clouds aren’t puffy white things; they’re mere outlines in the sky.
The backgrounds are by Tom O’Loughlin, who replaced Boris Gorelick in Freleng’s unit on cartoons that were released starting in 1958. Here’s more of his work, including the scarecrow that (deliberately) resembles Elmer Fudd.
Thomas Gardner O’Loughlin was born in Canada on Christmas Eve Day 1923 to Ernest W. and Nellie Jane Gardner, neither of whom were Canadian (his father was from Washington State). The family was living in Edmonton in 1935 and moved to Marion, Indiana by 1940.
A posting on the Big Cartoon Database states O’Loughlin began work in the animation industry in 1947. He was married in 1953 but his marriage certificate doesn’t list his occupation. As you might expect from someone in Friz’ unit, he later worked at DePatie-Freleng and spent time at Filmation. He died in Healdsburg, California on October 26, 2007.