Colour shading of the fabric can occur
The properties of fabrics vary depending on the material and design, which can lead to differences in appearance. Colour shading is created by the positioning of the fabric, the incidence of light or the direction from which the sofa is viewed
Differences in colour shading are not a defect, but a natural part of the material and its character.
The type of sofa combination you have also plays a role. A corner sofa or a sofa with chaise longue will show colour shading where the angle is broken.