If you are using Blender, you are noticing a problem I have had forever until just a few months ago, Imma tell you a secret.
In Blender, the materials panel, the first 2 options are Diffuse color and Diffuse intensity.
By default the color is less than pure white and the intensity is 0.800
On every single item you make, where there is a texture, you should push the color slider to max, its only a little bit but that little bit takes 10% of your brightness away.
Next you should drag the color intensity all the way up. By default its at 0.8 so it it taking 20% of your texture intensity away.
The result is 30% brighter, more intense colors and a fresh lemon fragrance.
Also Specular color above about half way will result in some surface shine which dulls the graphic quality of the texture.
The bad news is you have to do this for every single texture on every single object.
Remember how all the houses and trees on domain earth were dull and washed out until a couple of months ago? Now they are clear and bright, thats what I did.