The file extension ACBL is used by the desktop publishing software Adobe Indesign for so-called Color Book Legacy files. In these color libraries or catalogs are stored. These consist of a collection of color codes, names, brightness and chroma values, and color space specifications such as RGB, LAB or CMYK. In addition, library information such as name, description, color number and author are included.
ACBL is an XML-based format and represents the old color book format. Meanwhile, Adobe has again introduced a binary format using the extension acb.
ACBL color catalog files are commonly used in image editing and print production to meet a specific color standard. Depending on the intended use of the image (screen, print, etc.), certain color catalogs are better suited than others.
These files are stored in the legacy directory within the color charts or color swatches directory.
Most often resolving problems with opening ACBL files is very simple. Just install an appropriate program that supports such files. All of the listed programs support ACBL files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of ACBL files or offer file conversion options, but may not be capable of editing such files.
It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate ACBL files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the Adobe InDesign applications is not on the list, select "Browse" option in order to manually locate the directory where Adobe InDesign has been installed.
Sometimes problems with opening ACBL files may not lie with the application itself, but can arise due to other causes, such as: