REX sky colors are too grey, no?

[alexzar14]

First I installed clouds only, being reluctant installing sky textures as the native colors were ok. Nevertheless I installed the sky textures and I regret. The colors are displayed differently in P3D, the textures made for FSX won't show up as blue in P3D, no matter what textures I select they appear gray or grayish-blue (like a rainy November sky).