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coordinates and the total organic carbon content in compost were correlated. Two particle sizes of 0.5 and 2 mm were obtained in the compost samples; the surface color was analyzed with a CIE L * a * b * colorimeter and the total organic carbon content by spectrophotometry at 588.9 nm. e results indicate that all chromaticity values were significantly affected (p < 0.001) by particle size. Chromaticity values a * , b * , C * , and h°showed significantly strong Pearson correlations (r > 0.95). e coordinates a * (r � −0.992) and b * (r � 0.968) have the potential to be used in estimating the total organic carbon concentration in the compost samples analyzed.