Black and white films can be colored through a process called film colorization. This process involves adding color to the original black and white film to create a color version of the movie. The methods used to colorize films have evolved over time, from hand-painting each frame to using computers to digitally color individual objects. The most recent method of colorization uses software to color each pixel, which is then blended together to create a continuous image.
To assess the original color of a black and white object, colorization artists and historians use a variety of techniques. They may study photographs or other historical records to determine the colors used in costumes, sets, and makeup. They may also consult with experts in the field to ensure accuracy. It is important to note that when colorizing black and white films, the original colors may not be known or may not be accurate, as the film was designed to look good in black and white, not in color.