ACB File

What are ACB files and how to open them

Are you having problems opening an ACB file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is an ACB file?

ACB files have multiple uses, and Adobe Photoshop Color Book is one of them. Read more about the other uses further down the page.

Adobe Photoshop Color Book

These ACB files contain the colors used in Adobe Photoshop. Easily comply with color standards for printing an image versus using it on your computer, using this file. Adobe Photoshop uses ACB to load custom color books.

How to open ACB files

Important: Different programs may use files with the ACB file extension for different purposes, so unless you are sure which format your ACB file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested three different ACB openers which you will find listed below.

Last updated: November 30, 2022

More file formats using the ACB extension

Through our research of ACB files, we know that the following formats exist. However, we have not yet analyzed them in detail.

  • Atom Cue Sheet Binary
  • AutoCAD Color Book

Various apps that use files with this extension

These apps are known to open certain types of ACB files. Remember, different programs may use ACB files for different purposes, so you may need to try out a few of them to be able to open your specific file.

ATLAS.tiATLAS.tiUser submitted
Instant AccessInstant AccessUser submitted
MyFirewallMyFirewallUser submitted

Help us help others helps thousands of users every day, and we would love to hear from you if you have additional information about ACB file formats, example files, or compatible programs. Please use the links below or email us at to discuss further.