diff --git a/include/libweston/libweston.h b/include/libweston/libweston.h
index ceaca6a9..c361d76a 100644
--- a/include/libweston/libweston.h
+++ b/include/libweston/libweston.h
@@ -534,6 +534,7 @@ struct weston_output {
 	struct weston_color_characteristics color_characteristics;
 
 	struct weston_output_color_outcome *color_outcome;
+	uint64_t color_outcome_serial;
 
 	int (*enable)(struct weston_output *output);
 	int (*disable)(struct weston_output *output);
diff --git a/libweston/backend-drm/drm-internal.h b/libweston/backend-drm/drm-internal.h
index 87049de5..1afbaf52 100644
--- a/libweston/backend-drm/drm-internal.h
+++ b/libweston/backend-drm/drm-internal.h
@@ -551,6 +551,7 @@ struct drm_output {
 	uint32_t gbm_bo_flags;
 
 	uint32_t hdr_output_metadata_blob_id;
+	uint64_t ackd_color_outcome_serial;
 
 	/* Plane being displayed directly on the CRTC */
 	struct drm_plane *scanout_plane;
diff --git a/libweston/backend-drm/kms-color.c b/libweston/backend-drm/kms-color.c
index 8219c94c..476480d5 100644
--- a/libweston/backend-drm/kms-color.c
+++ b/libweston/backend-drm/kms-color.c
@@ -113,7 +113,8 @@ drm_output_ensure_hdr_output_metadata_blob(struct drm_output *output)
 	uint32_t blob_id = 0;
 	int ret;
 
-	if (output->hdr_output_metadata_blob_id)
+	if (output->hdr_output_metadata_blob_id &&
+	    output->ackd_color_outcome_serial == output->base.color_outcome_serial)
 		return 0;
 
 	src = weston_output_get_hdr_metadata_type1(&output->base);
@@ -167,7 +168,11 @@ drm_output_ensure_hdr_output_metadata_blob(struct drm_output *output)
 		return -1;
 	}
 
+	drmModeDestroyPropertyBlob(output->backend->drm.fd,
+				   output->hdr_output_metadata_blob_id);
+
 	output->hdr_output_metadata_blob_id = blob_id;
+	output->ackd_color_outcome_serial = output->base.color_outcome_serial;
 
 	return 0;
 }
diff --git a/libweston/compositor.c b/libweston/compositor.c
index c532414e..45502e18 100644
--- a/libweston/compositor.c
+++ b/libweston/compositor.c
@@ -6537,6 +6537,7 @@ weston_output_set_color_outcome(struct weston_output *output)
 
 	weston_output_color_outcome_destroy(&output->color_outcome);
 	output->color_outcome = colorout;
+	output->color_outcome_serial++;
 
 	output->from_blend_to_output_by_backend = false;