Plastic mulches are widely used for the production of vegetables. An experiment was conducted to examine the effect of colour plastic mulches on water use efficiency (WUE) and yield of okra under drip irrigation. The treatments were laid out in Split-plot design with three replications and a non-mulched treatment as control. The plastic coloured mulches used were white on black, silver on black and black. The irrigation levels used were 60, 80, 100 and 120 per cent ET. Results indicated that colour plastic mulching increased yield in white on black plastic colour mulch indicated 20to 30 per cent increase in yield compared to control treatment. The optimum WUE of 7.36 q ha-1cm-1was recorded under white on black plastic colour mulch with 80 per cent of ET. The net income was recorded higher under white on black plastic colour mulch with 80 per cent ET (`198,522 ha-1) and lowest in black plastic mulch at 120 per cent ET(` 118,922 ha-1).Similarly highest benefit-cost (BC) ratio of 3.15 was obtained in treatment of irrigation at 80 per cent ET with white on black plastic colour mulch followed by white on black mulch with 60 per cent ET (3.01).