.ACBL File Extension
File TypeAdobe Color Book Legacy File
This file is saved in a binary format, which requires a specific program to read its contents.
What is an ACBL file?
Legacy color book file used by Adobe InDesign, a digital page layout and publishing program; contains color records that specify properties of color, such as lightness and chrominance; used for storing different color sets, depending on the target publication media.
Adobe color books now use the .ACB extension.