I started out with a color image, converted it to grayscale, manipulated that grayscale image, and then want to convert the manipulated image back to the original coloring,the manipulation created same grayscale value that was already present, then t

I started out with a color image, converted it to grayscale, manipulated that grayscale image, and then want to convert the manipulated image back to the original coloring,the manipulation created same grayscale value that was already present, then tell me what to do.