Boy clothes dull and sad

I hate the style of boy clothes in general stores, everything is brown, dull blue or off green. The color range is just sad and the print is only dinosaurs, construction and wild animals. I find girls clothes happier, with brighter colors and a wide range of styles to choose from.

Where can I find boy clothes that are happier, brighter and with a variety of prints (and affordable too)? I like neutral clothes aswell, I kinda hate gender bias such as pink for girls, construction for boys, and so on.