The artist used a soft palette of earthy tones and muted greys. He often painted interiors where light entered through a single window. His work avoids sentimentality while capturing the quiet focus of his subjects. In pieces like De aardappelschilster, he records a mundane task with technical precision. He used broad brushstrokes to build texture on the walls and clothing of his figures. This method creates a sense of stillness in his compositions.

Modern collectors value Kever for his ability to find beauty in ordinary moments. His depictions of children, such as Kinderen met een prentenboek, offer a calm atmosphere for a contemporary home. These prints provide a connection to a slower pace of life. The neutral colours fit well with modern interior design styles. His work remains popular because it focuses on universal human experiences like motherhood and play.