Diesels used as switchers between 1935 and 1960 were painted black, with just a thin white or silver horizontal accent stripe (the sills were painted similarly). The letters "A.T.& S.F." were applied in a small font centered on the sides of the unit, as was the standard blue and white "Santa Fe" box logo. After World War II, diagonal white or silver stripes were added to the ends and cab sides to increase the visibility at grade crossings (typically referred to as the "Zebra Stripe" scheme). "A.T.& S.F." was now placed along the sides of the unit just above the accent stripe, with the blue and white "Santa Fe" box logo below.