1. to add color to something that was originally in black and white, especially a film or photograph
Usage: British spelling; American spelling is 'colorize'; commonly used in film and photography contexts
2. to make something more interesting or lively by adding vivid details or embellishment
Usage: figurative use

Examples

• The studio decided to colourise the classic black-and-white film for modern audiences.
• Technicians spent months colourising the old photographs from the 1950s.
• She used vivid descriptions to colourise her otherwise plain narrative.
• The director chose not to colourise the original footage, preserving its historical authenticity.
• Digital tools now make it easier to colourise vintage movies than ever before.
• He colourised the grayscale images with period-accurate hues.
• The author colourised her memoir with anecdotes and personal reflections.