ACO File: What is it?

Writer:   |   Refreshed: December 05, 2018

Microsoft Silver

ACO File Summary

File Extension ACO has only one distinct file type (Adobe Photoshop Color Swatch File format) and is mostly associated with Adobe Photoshop CC (Adobe Systems Incorporated) and one other software programs. These files can be categorized as Settings Files.

Windows, Mac, and Web operating systems can be used to view ACO files. Both desktop and mobile devices enable you to view and (sometimes) edit these files, depending on the software used. The Popularity Rating for ACO files is "Low", which means these files are not ordinarily found on an everyday user's device.

Please see the detailed information below to learn more about ACO files and the programs that can open them. In addition, we provide simple troubleshooting information to help you open your ACO file.

Low
Prevalence
468
File Rank

/ 11690

Active

Status

5

December

2018

Page Last Updated

FileViewPro Opens ACO Files

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Types of ACO Files


Leading ACO Type

.ACO
File Name:.aco
File Type:Adobe Photoshop Color Swatch File

Adobe Photoshop color file. It keeps a color swatch and a name for every color, which gets displayed when a user hovers the mouse over the color in the palette. These ACO files create images which conform to particular color standards.

Organization: Adobe Systems Incorporated
File Category:Settings Files
Entry: HKEY_CLASSES_ROOT\.aco

Software Programs That Open The Adobe Photoshop Color Swatch File:


Adobe Photoshop CC by Adobe Systems Incorporated

Windows
Mac

ACO File Viewer by Adobe Systems Incorporated

Web

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ACO File Popularity


OS Hierarchy

7 (45.73%)
10 (44.56%)
8.1 (5.41%)
XP (2.79%)
8 (0.97%)


Understanding ACO Issues


Typical ACO Opening Challenges

Adobe Photoshop CC is Not Installed

You encounter an error message such as "%%os%% Can't Open ACO Files" when trying to open your ACO. Customarily, this means that Adobe Photoshop CC is not installed on %%os%%. This will prevent you from double-clicking to open the ACO file because the OS doesn’t know how to handle it.


Tip: Another ACO-related program can be selected to open the file by clicking "Show Apps" and finding the application.


Adobe Photoshop CC Requires Update

Occasionally, you might have an outdated version of Adobe Photoshop CC installed that's incompatible with your Adobe Photoshop Color Swatch File type. You will need to download a newer version of Adobe Photoshop CC if you don't have the right version. This problem is predominately due to having a Adobe Photoshop Color Swatch File file version that was created by a newer version of Adobe Photoshop CC than what you have installed on your PC.


Tip: If you right-click on your ACO file, then select "Properties" (Windows) or "Get Info" (Mac), you can obtain hints about what version you need.


Summary: In either case, the majority of problems opening ACO files are related to not having the correct software application installed on your computer.


More Causes of Problems Opening ACOs

Assuming you have the right Adobe Photoshop CC version installed, other problems can prevent you from opening ACO files. If you are continuing to have errors with loading ACO files, other external issues might be to blame. Additional factors include:

  • ACO file references in the Windows Registry are broken
  • Mistaken removal of the Windows registry ACO description
  • Incomplete or bad installation of a software application associated with the ACO format
  • File corruption affecting your ACO file
  • ACO file integrity has been compromised by malware
  • Hardware related to ACOs has device driver corruption
  • Your computer does not have the adequate system resources to open the Adobe Photoshop Color Swatch File format

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