OpenColorIO
OpenColorIO is a free color-management solution for motion-picture production, with particular use in visual effects and computer animation.
What OpenColorIO is
OpenColorIO is a free color-management solution for motion-picture production, with particular use in visual effects and computer animation. It serves artists, studios integrating color management into pipelines, and developers building or upgrading color-management frameworks. Its Python API can be used to integrate a studio pipeline or change a configuration. Config merging is in preview, with controls for name and alias conflicts and duplicate color spaces. The GPU renderer supports the Khronos Vulkan graphics API, and the project describes ACES 2.0 support as feature complete, including ACES 2.0 Output Transforms as OCIO views. It also supports Color Interop ID and attributes for ICC and AMF. Listed integrations include Blender, Autodesk Maya, Houdini, Nuke, Photoshop, and Unreal Engine, with version requirements for some applications. OpenColorIO is available as an API and for Linux, macOS, and Windows. Current documentation points users to package managers for prebuilt libraries; Python bindings and command-line tools can be installed from PyPI. The project is hosted by the Academy Software Foundation and uses the BSD-3-Clause license.
Good
- Free and BSD-3-Clause licensed
- Python API supports pipeline integration
- GPU renderer supports Vulkan
- Listed integrations include Blender, Maya, and Nuke
Watch out
- Config merging is still in preview
- Prebuilt libraries are not generally downloadable artifacts
- Some integrations have application version requirements
Who it suits
It suits artists and studios managing color in motion-picture, visual-effects, or animation pipelines, as well as developers building color-management frameworks. Teams can use the Python API to integrate a pipeline or modify a configuration.
Verdict
OpenColorIO offers color-management tools and integrations for production pipelines across Linux, macOS, and Windows. Consider its preview status for config merging and the package-manager route for prebuilt libraries when planning adoption.
Plans and prices
From OpenColorIO's own pricing page, checked 14 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| OpenColorIO | Free | Free and open-source software · no paid tiers stated |
| OpenColorIO Python package | Free | Python bindings and command-line tools available through PyPI |
The facts
Each one read from OpenColorIO's own pages, with the date it was checked.
What it does
- ACES support
- OpenColorIO is compatible with the Academy Color Encoding Specification and includes built-in ACES 2.0 configurations in version 2.5.checked 14 Oct 2026
- Audience
- The project describes use for artists, studios integrating color management into pipelines, and developers building or upgrading color management frameworks.checked 4 Oct 2026
- Autodesk Flame integration
- Autodesk Flame supports context variables, viewing rules, categories, virtual displays, OCIOZ archives, and configuration merging.checked 14 Oct 2026
- Blender integration
- Blender integrates OCIO into its redesigned color-management system, with documented support from Blender 2.64 onward.checked 14 Oct 2026
- Build requirements
- Source builds require a supported C++17–23 compiler, CMake 3.14 or newer, and an internet connection for dependency retrieval.checked 14 Oct 2026
- C++ API
- The core OpenColorIO API is available in C++, with examples including ocioconvert and ociodisplay.checked 14 Oct 2026
- Color consistency
- The framework is designed to keep color handling consistent across supported applications while allowing sophisticated pipeline configuration.checked 14 Oct 2026
- Color space attributes
- OCIO supports Color Interop ID and attributes for ICC and AMF.checked 4 Oct 2026
- Config merging
- Version 2.5 adds configuration-file merging as a preview feature for resolving aliases, duplicate color spaces, and related conflicts.checked 14 Oct 2026
- CPU processing
- The API exposes optimized CPU processors that apply transforms to packed RGB or RGBA image data and release Python's GIL during processing.checked 14 Oct 2026
- Governance
- The project is governed and hosted by the Academy Software Foundation under Linux Foundation guidance.checked 14 Oct 2026
- GPU processing
- The API exposes GPU processors that can extract shader information for application-side color processing.checked 14 Oct 2026
- GPU support
- The OCIO GPU renderer supports the Khronos Vulkan graphics API.checked 4 Oct 2026
- Installation
- The current documentation says prebuilt libraries are not provided as downloadable artifacts apart from package managers; Python bindings and command-line tools can be installed from PyPI.checked 4 Oct 2026
- Installation options
- Installation is available through package managers or source builds; the project does not provide general pre-built library downloads outside package managers.checked 14 Oct 2026
- Integration limits
- The homepage lists version requirements for some integrations, including Blender 2.64 and up, Maya 2016 and up, and Unreal Engine 4.22 and up.checked 4 Oct 2026
- Integrations
- The supported-application list includes Blender, Nuke, Maya, Houdini, Katana, Mari, Silhouette, Substance Designer, Unreal Engine, V-Ray, and many other tools.checked 14 Oct 2026
- Java API
- The documentation states that an OpenColorIO API is available for Java.checked 14 Oct 2026
- Known vulnerability fix
- The security policy records CVE-2026-42450, a stack-buffer-overflow issue fixed in OCIO 2.5.2.checked 14 Oct 2026
- Licence
- OpenColorIO is distributed under the permissive BSD-3-Clause license.checked 14 Oct 2026
- License
- OpenColorIO is licensed under the BSD-3-Clause license.checked 4 Oct 2026
The company
- Company fact
- The Academy Software Foundation announced OpenColorIO as its second hosted project on February 8, 2019.checked 14 Oct 2026
- Company identity
- The documentation describes OpenColorIO as a project hosted by the Academy Software Foundation.checked 4 Oct 2026
- Founded
- 2003checked 28 Sep 2026
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