background image in Farb-Sektion is blurry in full width

Hi Kreisi Team,

when Im using the Farb-Sektion of the Layout Editor and editing a background image. I wanna show it as full width background image.
Therefor I selected “strecken um anzupassen”. Now the Image isn’t showing clearly in frontend, the image has a 1920px width though.

Am I doing something wrong or should I use something else for an background image as a section?
When Im using the background image as a slider, the image is perfectly. But I don’t want to use a slider, because I need place some Text and other stuff on the background image.