One of the most important properties of fabrics, especially in fabric and final product purchasing processes, is their color properties. Raw material and spinning technology are among the most important factors affecting dye absorption. Within the scope of this study, regenerated cellulosic fiber, which have come to the forefront due to their biodegradability properties in parallel with the increasing environmental awareness in recent years, and cotton blended yarns were produced in three different spinning technologies (ring, compact, vortex), and then single jersey knitted fabrics were produced from these yarns using the same machine settings. Yarn linear density for all yarns is 20 tex. The single jersey knit fabrics produced were dyed under the same conditions using the same reactive dyestuff. After dyeing, all fabrics were washed under the same washing conditions and the same post-treatments were applied. Color yield (strength) (K/S), reflectance (R) and lightness (L), yellowness-blueness (b) and redness-greenness (a) values ​​of dyed single jersey knitted fabrics were measured by spectrophotometer. Minolta Spectrophotometer CM-3600d was used for color measurements. CIE L*a*b*C*h° color coordinate system, D65 illumination and 10° observer angle were used in the measurements. Measurements were made in the 440 nm spectral region. The K/S (color yield) value is called the chromaticity (color strength) of the fabric and is calculated by the device according to the Kubelka/Munk formula. The reflectance (R) value shows the reflectance value of the fabric at the maximum absorption wavelength. Measurement results were statistically analyzed at 95% confidence interval (α=0.05) using IBM SPSS 25.0 program. When the results are examined, it is seen that the effect of spinning technology and raw material on the dyeability properties of fabrics is statistically significant. When a general evaluation is made in terms of color yield (K/S), it is seen that the highest values ​​belong to single jersey knitted fabrics produced from vortex yarns, since they have a more voluminous structure compared to other yarns. It was concluded that the K/S value increased with the increase in the amount of regenerated cellulosic fiber in the blend. When an examination is made in terms of reflectance properties, it is seen that fabrics produced from compact yarns, which stand out with their smoother yarn surface properties, have higher reflectance values. The lowest reflectance feature belongs to the fabrics produced from vortex yarns due to the effect of the wrapper fibers in its structure. When the effect of the raw material on the reflectance values ​​was examined, the reflectance value increased with the increase in the amount of regenerated cellulosic fiber in parallel with the color strength.