Purpose : This study evaluated the color consistency between sample tinted lenses provided by manufacturers and custom-ordered tinted lenses by analyzing color differences (ΔE) and luminous transmittance based on CIE L*a*b* color coordinates. Methods : Tinted lenses from three companies were ordered in three colors (brown, green, and gray) at two-week intervals, for a total of ten orders. The color difference and luminous transmittance between the sample and custom-ordered lenses were analyzed, with particular attention to cases in which the color difference was ΔE≥1.5. Results : Significant differences in luminous transmittance and color difference were observed between the sample and custom lenses (p<0.050). Some lenses exhibited a ΔE value of 5 or higher, indicating a clearly perceptible mismatch. Variability was also observed among lenses produced under the same manufacturing conditions. Conclusion : Color deviations in lens manufacturing may reduce consumer satisfaction and product reliability. Manufacturers should standardize their production processes and implement quality control measures to maintain a color difference of ΔE≤1.5. These findings highlight the need for rigorous quality management to ensure consistent color performance in tinted lenses.