The word "colorcast" refers to an unintentional tint or hue in a photograph or video that affects the overall color balance of the image. Antonyms for "colorcast" could include terms like "true-to-life" or "natural color balance," which describe images that accurately capture the colors present in the scene without any distortion. Other antonyms might include "neutral," "unaffected," "unbiased," or "unadulterated." These terms imply that the image has not been altered or influenced by any external factors or manipulation, resulting in a faithful representation of the original colors as they appear in real life.