A new and distinct cultivar of Caladium plant named ‘;ZRD 2318-183’;, characterized by its intermediate to tall height; mounding habit; dense and bushy appearance; vigorous growth habit and rapid growth rate; fancy-type leaves that are dark green in color with bright white-colored venation surrounded with bright white-colored areas and interveinal areas that are bright white and greyed green in color with white-colored flecks, speckles, blotches and streaks; and leaf petioles that are black in color with green and white-colored stripes, stipples and streaks.