Colour Editor

Colour Editor is a lightweight and portable application that can replace colors within BMP and JPG images. It has integrated color pickers as well as support for bulk processing. Even casual users with little experience in graphic editing tools can quickly get familiarized with it.

No installation is necessary

There are two separate executables in the downloaded package, for single and bulk processing. They can be copied to a preferred directory on the disk or stored on a flash drive to launch the tool on any computer without setup. No new entries are added to the system registry, and no files are created on the disk without your consent.

Single and batch processing mode

The interface of Colour Editor is plain and easy to use. The only difference between the single and batch modes is the fact that the latter one has a list that you can populate with numerous images from a selected directory to process all files at the same time.
It's possible to view the file contents in a built-in image viewer, use a color picker to select any color from the picture using the mouse pointer, as well as choose a basic or custom color from the integrated palette, or directly input the RGB channels if you have this information at hand.
Modifications can be applied to the picture by clicking a button, but they aren't committed until you overwrite the source file or create a new one. The utility can also be instructed to swap the input and output colors, undo the last action, and overwrite any existing files without confirmation. It also acts as an image converter because it gives you the possibility to save BMPs as JPEGs and vice versa (the JPEG quality can be adjusted).

Modest utility for replacing image colors

The color picker isn't accompanied by a pixel-level magnification tool to get a better view of the selected color. Moreover, Colour Editor looks rather rudimentary and doesn't have more features under its hood. We are also keeping in mind that the developer hasn't updated it for a significant amount of time. Nonetheless, it's functional on later Windows models, simple to operate, and gets the job done.