The coupe 'Sunny' rear emblem is Red as shown in the brochure, but it loses the color over time. There is only one part number listed
Note how the Coupe 'Sunny' is flat, whereas the Van 'Sunny' (previous post) is rounded
There is a 'Sunny' badge on the rear and also a 'Sunny' badge on the sides

Early Coupe (KB210 to NOV 1975) rear - right side
79842-H5500 EMBLEM-rear finisher 'Sunny'