diff --git a/documents/Specification/inprog_v1.39/MaterialX.Specification.md b/documents/Specification/inprog_v1.39/MaterialX.Specification.md
index c0dc5c9b48..6230618a5e 100644
--- a/documents/Specification/inprog_v1.39/MaterialX.Specification.md
+++ b/documents/Specification/inprog_v1.39/MaterialX.Specification.md
@@ -339,6 +339,8 @@ By default, MaterialX supports the following color spaces as defined in ACES 1.2
* `lin_srgb`
* `adobergb`
* `lin_adobergb`
+* `srgb_displayp3`
+* `lin_displayp3`
The working color space of a MaterialX document is defined by the `colorspace` attribute of its root <materialx> element, and it is strongly recommended that all <materialx> elements define a specific `colorspace` if they wish to use a color-managed workflow rather than relying on a default colorspace setting from an external configuration file.
diff --git a/libraries/README.md b/libraries/README.md
index bf932e9b47..15916f76e2 100644
--- a/libraries/README.md
+++ b/libraries/README.md
@@ -42,8 +42,18 @@ This folder contains the standard data libraries for MaterialX, providing declar
- [lama](bxdf/lama) : Graph definitions of the [MaterialX Lama](https://rmanwiki.pixar.com/display/REN24/MaterialX+Lama) node set.
## Color Management Library
-- MaterialX shader generation natively supports a small set of common spaces for input colors, with all color transforms implemented as language-independent MaterialX graphs. The canonical definitions of these color transforms may be found in the OpenColorIO configuration for [ACES 1.2](https://github.com/colour-science/OpenColorIO-Configs/tree/feature/aces-1.2-config/aces_1.2).
- - lin_rec709, g18_rec709, g22_rec709, rec709_display, acescg (lin_ap1), g22_ap1, srgb_texture, lin_adobergb, adobergb
+- MaterialX shader generation natively supports a small set of common spaces for input colors, with all color transforms implemented as language-independent MaterialX graphs.The canonical definitions of these color transforms may be found in the OpenColorIO configuration for [ACES 1.2](https://github.com/colour-science/OpenColorIO-Configs/tree/feature/aces-1.2-config/aces_1.2).
+ - lin_rec709
+ - g18_rec709
+ - g22_rec709
+ - rec709_display
+ - acescg (lin_ap1)
+ - g22_ap1
+ - srgb_texture
+ - lin_adobergb
+ - adobergb
+ - srgb_displayp3
+ - lin_displayp3
- [cmlib](cmlib)
- [cmlib_defs.mtlx](cmlib/cmlib_defs.mtlx) : Nodedef declarations.
- [cmlib_ng.mtlx](cmlib/cmlib_ng.mtlx) : Nodegraph definitions.
diff --git a/libraries/cmlib/cmlib_defs.mtlx b/libraries/cmlib/cmlib_defs.mtlx
index 4f413e9baa..dc912581d2 100644
--- a/libraries/cmlib/cmlib_defs.mtlx
+++ b/libraries/cmlib/cmlib_defs.mtlx
@@ -87,4 +87,24 @@
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diff --git a/libraries/cmlib/cmlib_ng.mtlx b/libraries/cmlib/cmlib_ng.mtlx
index 8216504c02..8045e80a4d 100644
--- a/libraries/cmlib/cmlib_ng.mtlx
+++ b/libraries/cmlib/cmlib_ng.mtlx
@@ -294,4 +294,74 @@
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diff --git a/resources/Materials/TestSuite/stdlib/color_management/color_management.mtlx b/resources/Materials/TestSuite/stdlib/color_management/color_management.mtlx
index 1e77bc129a..ea2a9455ce 100644
--- a/resources/Materials/TestSuite/stdlib/color_management/color_management.mtlx
+++ b/resources/Materials/TestSuite/stdlib/color_management/color_management.mtlx
@@ -64,6 +64,20 @@
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