Colourcast refers to the presence of colour imbalance in an image due to lighting or camera settings. If you're looking for synonyms for the word, you could use terms such as colour shift, colour distortion, hue shift, or chromatic aberration. These words describe the different types of colourcast that might occur. A shift refers to a change in colour balance, while distortion suggests a more severe alteration. Chromatic aberration is used to describe colour fringing that occurs due to lens issues. As a photographer or image editor, it's important to recognise and correct colourcast to ensure accurate and visually appealing images.