Replacing color not working for me

[playdoh]

I have a picture that i'm trying to recolor. I'm going to image, adjustments, replace color. I'm choosing the color I want to replace and then choosing a color out of my swatch to replace it with and when the color loads onto my image it doesn't look anything like the color i chose. I don't want to use the saturation, hue, and lightness bars. I have a specific color that I want to use and it doesn't seem to be working. Any help would be greatly appreciated thanks.

[iDad]

It sounds like the colors you want to replace maybe different shades of one color, are you getting down to the pixels to see the difference