Steganography is the process of embedding original message bits on some carrier file. The carrier file may be text file, image file, audio file or video file etc. If that carrier file is an image file, then that technique is called Image steganography [1]. If color image is used as a carrier file to embed data bits, then that type of steganography technique is called as color image steganography [7]. In this proposed work, embedding the original message bits in the transform domain of the carrier color image without considering the green plane, hence it is resulting in high quality stego image. Hence this technique is called as improved color image steganography technique in transform domain. Here in this paper, DCT (Discrete Cosine Transform) technique has been used.