1. Photographic silver halide material for preparing a monochromatic dye image by a chromogenic process which material comprises in at least one silver halide emulsion layer a colour coupler which couples with oxidized colour developer of aromatic primary amino type to produce a yellowish dye which absorbs light in the region of from 350 to 560 nm, a more reactive coupler compound which reacts with oxidized colour developer of the primary amino type to yield a dye of which the absorption is predominantly above 560 nm, and optionally further colour couplers, the ratio of coupler which produces a yellowish dye to more reactive coupler being from 10:0.1 to 10:2.0, the parts being by weight.