That's right, it checks the amount of colours (and few additional things). In your case I'd replace similar colours with one colour. This picture can be made with using 16 (maybe 8?) colours.
dersteiner, qual a função dessa ferramenta? ela só mostrou quantas cores existem na foto.
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dersteiner, what the function of this tool? it only shows how many colors there are in the picture.
sorry for my bad english ^^
300 colours, according to this quite useful tool http://hivemind.in/pj/specs/ - which is way too much..
Adam na verdade eu usei essa imagem como referencia para fazer a pixel-art, e não, não é uma cor reduzida, até pode parecer, porque eu fui colocando cores existentes na imagem original na pixel art.
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Adam actually I used this image as reference to make pixel art, and no, not a reduced color until it may seem, because I was putting colors in the original image in pixel art.
^^
This looks like a color reduce of http://inspirationfeed.com/wp-content/uploads/2011/11/LAWHEEGEE_by_MikePMitchell1.jpg. I may be wrong there, but it would have been nice if you had posted the reference as well.