colour cast
/ˈkʌlə ˌkɑːst/ /ˈkʌlə ˌkast/(US color cast)
noun
A tint or coloration affecting the appearance or look of something; (Photography and Film ) an unwanted colour affecting the whole of an image evenly, typically resulting from the nature of the ambient light, or from incorrect development or processing.
Origin
Mid 18th century; earliest use found in Henckel's Pyritologia. From colour + cast.