It is a mix of both. For some, a slightly darker/lighter hue/shade looked better on the design. However, for most it is because of the color limitations. I tried to stick as close as possible to the flag colors as I could, but sadly there is a limit to Pantone colors. I have all the color codes listed on the Kickstater images for each dinosaur so if you have a better suggestion for any of them please throw me the Pantone code!