What is the COL file format?
A .col file created by Autodesk Animator stores a color palette used in DOS-era 2D animation software. Autodesk Animator and Animator Pro, released starting in 1989, relied on 8-bit indexed color - a 256-color palette was the foundation of all animation work under DOS.
The format is a compact binary file: 256 RGB color entries packed sequentially at 3 bytes each (red, green, blue), yielding a standard file size of 768 bytes. Some variants include a small 2-byte header indicating the entry count. The palette is stored as a raw flat array with no compression or encryption.
.col files were saved and loaded within Autodesk Animator Pro (AAPRO) to apply consistent color palettes across animation frames. The format reflects the constraints of the VGA 256-color era and has no role in modern workflows.
Note that the .col extension is shared by several unrelated applications: AutoCAD uses .col files for color configuration, and Phase One Capture One uses .col for its own color settings. Context and companion files determine which type you have. For modern palette work, formats such as .ACT (Adobe Color Table) or .PAL have largely replaced it.
Security & safety
RISK: LOWCOL files are pure data (palette or style data); they cannot contain executable code. No known malware uses .col as a vector.
Format details
in a nutshell- Phase One Capture One Color Style - Capture One photo editing software uses .col for saved color style/preset files - a proprietary XML or binary format unrelated to Autodesk Animator.
- Various Game Engine Color/Collision Files - Many game engines (including id Software's Quake engine derivatives, Nintendo formats) use .col for collision data or color lookup tables - completely unrelated formats.
- AutoCAD Color Book - Some AutoCAD color palette exports may carry a .col extension, though the standard AutoCAD color book format is .acb (XML).
Programs that open COL files
Windows3 apps
Autodesk Animator Pro (legacy, DOS)
Free DOS emulator (DOSBox) required. Autodesk Animator Pro → Palette → Load .col file.
Phase One Capture One (for Capture One .col files)
Paid Styles & Presets panel → Import Style - select the .col file.
AutoCAD (for AutoCAD COL files)
Paid COL files in AutoCAD context are loaded via the color picker / color book manager. 
macOS1 app
Technical details
deep spec| Format type | Binary 8-bit indexed color palette |
| Color model | RGB - one byte per channel (0-255 per red, green, blue component) |
| Color entries | 256 fixed entries representing one complete VGA/8-bit color palette |
| Bytes per entry | 3 bytes (R, G, B stored sequentially with no padding) |
| Standard file size | 768 bytes (256 entries × 3 bytes, header-less variant) |
| Header variant | Some files prefix a 2-byte entry count field, yielding slightly larger files |
| Byte order | Little-endian |
| Container | Flat binary palette array - no wrapper structure |
| Platform origin | DOS VGA 256-color environment, Autodesk Animator 1.0 (1989) |
| Associated OS | DOS (original), early Windows (legacy compatibility) |
| Extension conflict | `.col` is shared by AutoCAD (color configuration), Phase One Capture One (color settings), and various game engines - all unrelated formats |
| Color depth context | Designed for VGA 256-color mode; each palette entry maps to one of 256 possible pixel values in an indexed image |
| Superseded by | Adobe Color Table (ACT), modern XML-based color books, and PAL palette formats |
| Primary application | Autodesk Animator Pro (AAPRO) - principal consumer of `.col` palette files in DOS animation workflows |
| Released | 1989 (Autodesk Animator 1.0) |
| Latest version | N/A - format is legacy; Autodesk Animator discontinued circa 1994 |
Community Q&A
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