While programming red lights i noticed that they where lightning green. So I changed the Code to NeoPixelColors.Green and then the lights where lightened red.
Mystery solved:
It´s not the neopixel package which is broken, There are different kinds of Neopixels!
The clear one shows the "right" red, the diffuse one shows green instead. Red and green is there exchanged.
While programming red lights i noticed that they where lightning green. So I changed the Code to NeoPixelColors.Green and then the lights where lightened red.