diff --git a/libs/ui/DebugUtils.cpp b/libs/ui/DebugUtils.cpp
index d7e191d..d5654cc 100644
--- a/libs/ui/DebugUtils.cpp
+++ b/libs/ui/DebugUtils.cpp
@@ -234,6 +234,33 @@
     return android::base::StringPrintf("Unknown color mode %d", colorMode);
 }
 
+std::string decodeColorTransform(android_color_transform colorTransform) {
+    switch (colorTransform) {
+        case HAL_COLOR_TRANSFORM_IDENTITY:
+            return std::string("Identity");
+
+        case HAL_COLOR_TRANSFORM_ARBITRARY_MATRIX:
+            return std::string("Arbitrary matrix");
+
+        case HAL_COLOR_TRANSFORM_VALUE_INVERSE:
+            return std::string("Inverse value");
+
+        case HAL_COLOR_TRANSFORM_GRAYSCALE:
+            return std::string("Grayscale");
+
+        case HAL_COLOR_TRANSFORM_CORRECT_PROTANOPIA:
+            return std::string("Correct protanopia");
+
+        case HAL_COLOR_TRANSFORM_CORRECT_DEUTERANOPIA:
+            return std::string("Correct deuteranopia");
+
+        case HAL_COLOR_TRANSFORM_CORRECT_TRITANOPIA:
+            return std::string("Correct tritanopia");
+    }
+
+    return android::base::StringPrintf("Unknown color transform %d", colorTransform);
+}
+
 // Converts a PixelFormat to a human-readable string.  Max 11 chars.
 // (Could use a table of prefab String8 objects.)
 std::string decodePixelFormat(android::PixelFormat format) {
diff --git a/libs/ui/include/ui/DebugUtils.h b/libs/ui/include/ui/DebugUtils.h
index 3370107..7690093 100644
--- a/libs/ui/include/ui/DebugUtils.h
+++ b/libs/ui/include/ui/DebugUtils.h
@@ -30,5 +30,6 @@
 std::string decodeRange(android_dataspace dataspace);
 std::string dataspaceDetails(android_dataspace dataspace);
 std::string decodeColorMode(android::ColorMode colormode);
+std::string decodeColorTransform(android_color_transform colorTransform);
 std::string decodePixelFormat(android::PixelFormat format);
 std::string to_string(const android::Rect& rect);