This paper proposed to extend the ATD steganographic method to work with color images and conduct an experimental study of the modified algorithm. In the original ATD algorithm, which works on grayscale images, The main idea is embedding the secret message as the ternary number and in each pixel of cover image is embedding two ternary numbers. For color images. we propose embedding four ternary numbers within each pixel of the cover image. As is well known, color images are composed of three primary color channels: red, green, and blue. The final color is generated by blending specific intensities of these three channels. Accordingly, three embedding combinations (112,121,211) were proposed to determine how the four ternary numbers are distributed among the red, green, and blue channels of each pixel. Each such combination corresponds to approximately 8 BPP for example, using the combination 211 means embedding two ternary numbers in the red channel (R), and one ternary number in each of the green (G) and blue (B) channels. By using the Matlab program, we compared the results on eight color images selected as cover images to evaluate the performance of the proposed algorithm. Image quality metrics, such as Peak Signal-to-Noise Ratio (PSNR) and Mean Squared Error (MSE), were used to evaluate the algorithm’s performance according to our analysis, the value of PSNR is not affected by the scheme but depends on image; PSNR is in range from 34.50 dB to 37.57 dB in same embedding capacity 8 BPP. Moreover, SNR values across the different embedding combinations, suggesting comparable performance among them....................... Keywords: ..............Steganography, ATD, Peak Signal to Noise Ratio (PSNR), Embedding Capacity, Bit Per Pixel (BPP).