the group consisting of --CN, --CONR.sub.1 R.sub.2, --CO.sub.2 R.sub.1, --NO.sub.2, and --SO.sub.2 R.sub.1where R.sub.1 and R.sub.2 are H or substituents, X is H or a coupling-off group; Y is H or a substituent; Z is an atom or group selected from >N--R, --O--, and --S--.Elements employing this coupler exhibit an improved color density in the spectral region of 490 to 520 nm as well as an increase