Change a specific color by another

[Gammazeth]

Hi there ! I'm currently using GIMP to recolor some pokemon sprites and I wanted to know if it's possible to change every specific color present on the image by another, for example, I want all paleturquoise pixels to be turned into dark turquoise pixels without having to change manually the color of each pixel. ? If it's not possible, is it possible to select all pixels of a specific color in the image (actually I'm not talking about that magic wand) so that all paleturquoise pixels are highlighted/selected ?
Thanks in advance !