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Extracting natural dyes have been widely studied since the needs of eco-friendly and non-toxic natural dyes increased. In this paper, the natural dyes were extracted from sappan wood, gardenia, and mugwort containing brazilein, crocin, and chlor- ophyll process. After the extraction with variables of pH of solvent and reaction time, the chromaticity of extracted natural dyes was analyzed using quantitative values from brightness and color coordinate (L, a, b) based on the target colors of red, yellow and green. For the case of brazilein and crocin, the cadmium red and cadmium yellow, respectively were extracted. In the case of sappan wood and gardenia, the red pigment under pH 12 (△E = 18.2) and the yellow pigment at pH 9 (△E = 18.4) were extracted respectively. However, the color of extracted chlorophyll from mugwort was different from the target chrome green.

Chromaticity Analysis of Natural Dyes Extracted from Sappan Wood, Gardenia, and Mugwort