The article provides recommendations for the use of indicators such as Rd (light reflectance coefficient) and + b (yellowing rate) obtained in the HVI equipment of cotton fiber in order to control the color quality of the spun yarn. sorting has been developed to ensure the continuous production of spun yarns with constant quality indicators due to the minimum deviation of cotton fiber quality indicators, and recommendations have been made for the use of “SCI” (spinning index) value in cotton sorting and blending planning.