a new and useful process for producing a plastic article with an accent color pattern incorporated therein , and a specially formed accent color pellet which is useful in such a process . the process contemplates extruding a plastic product from a base compound formed of powder sized particles and specially formed accent color pellets . the accent color pellets are alloyed masses of resins and pigment which are larger than the powder particles of the base compound , and have a higher deflection temperature than the base compound . the alloyed pellets are designed with controlled heat deflection characteristics . during the extrusion process , the accent color pellets begin to soften and disperse later than the base compound , and cause restricted dispersion of the accent color into the base compound , thereby producing accent color streaks in the resulting extrudate . the process is particularly suited for producing a simulated woodgrain or streaking effect in plastic . siding .