Single colour on white gives unexpected result

[smth]

Is this "Dominant Color" correct? I would have expected #2ab5c8, given that white is ignored (right?). Is there a way to consistently get that result I'm expecting, i.e the colour covering the most area? For example, the colour in the middle of the palette is pretty close (might be a coincidence).

[perrarina]

I'm experiencing the same problem with a similar blue.

[henrikhelmers]

I am having a similar issue with white and mostly single color. The expected dominant color here is the intense red one. Source is http://www.vg.no/favicon.ico.