Black, Metallic Chrome and Neon Green themed.
The plant seeds can start off as rainbow flat hard drives / floppy discs and when activated they can upgrade into mounted black / grey robotic turrets that shoot glowing neon green laser beams. The turrets will reach into the floor and look like they are soldered to the ground. Neon green energy also will spiral up from the base of the turret to the cannon head, and it will visually look like intaglio (engraved but the engraving is filled in). For Zyra herself, standard Project attire.