As seen in the image, the camo is marked for “Forest” conditions while in the picture of the camouflage, it is in a desert environment and along with that the colors fit into a desert environment.
You can bug report it here (just search a bit first so that you don’t report something that is already reported and known about): (Gaijin.net // Issues)
A guide on how to report bugs can be found here: ([Navigation] Technical Knowledge Base | War Thunder Wiki)