diff --git a/src/Limelight.h b/src/Limelight.h
index 0a937ff..a7078a3 100644
--- a/src/Limelight.h
+++ b/src/Limelight.h
@@ -172,6 +172,18 @@ typedef struct _DECODE_UNIT {
 
     // Head of the buffer chain (never NULL)
     PLENTRY bufferList;
+
+    // Determines if this frame is SDR or HDR
+    //
+    // Note: This is not currently parsed from the actual bitstream, so if your
+    // client has access to a bitstream parser, prefer that over this field.
+    bool hdrActive;
+
+    // Provides the colorspace of this frame (see COLORSPACE_* defines above)
+    //
+    // Note: This is not currently parsed from the actual bitstream, so if your
+    // client has access to a bitstream parser, prefer that over this field.
+    uint8_t colorspace;
 } DECODE_UNIT, *PDECODE_UNIT;
 
 // Specifies that the audio stream should be encoded in stereo (default)
diff --git a/src/VideoDepacketizer.c b/src/VideoDepacketizer.c
index 69d5ad6..c86c868 100644
--- a/src/VideoDepacketizer.c
+++ b/src/VideoDepacketizer.c
@@ -453,6 +453,13 @@ static void reassembleFrame(int frameNumber) {
             qdu->decodeUnit.presentationTimeMs = firstPacketPresentationTime;
             qdu->decodeUnit.enqueueTimeMs = LiGetMillis();
 
+            // These might be wrong for a few frames during a transition between SDR and HDR,
+            // but the effects shouldn't very noticable since that's an infrequent operation.
+            //
+            // If we start sending this state in the frame header, we can make it 100% accurate.
+            qdu->decodeUnit.hdrActive = LiGetCurrentHostDisplayHdrMode();
+            qdu->decodeUnit.colorspace = (uint8_t)(qdu->decodeUnit.hdrActive ? COLORSPACE_REC_2020 : StreamConfig.colorSpace);
+
             // IDR frames will have leading CSD buffers
             if (nalChainHead->bufferType != BUFFER_TYPE_PICDATA) {
                 qdu->decodeUnit.frameType = FRAME_TYPE_IDR;