For Cement Pots, the color is usually not even and there might be some black or white spots that are 
generated in the pot production process, as different parts of cement are drying up in different timing and cause uneven color.
Uneven color for cement pot is unavoidable due to the natural cement dry-up process.

Hence, if you are looking for a perfect cement pot with even color, or two cement pots with same color, this might not be possible and we would recommend you to consider ceramic pot instead.

Please refer to the example at the bottom of this page -