diff --git a/data/yuv.frag b/data/yuv.frag
index d6fceb0..f7d7879 100644
--- a/data/yuv.frag
+++ b/data/yuv.frag
@@ -23,9 +23,9 @@ main()
     texture2D(texture, top_right_uv).r,
     texture2D(texture, bottom_left_uv).r,
     texture2D(texture, bottom_right_uv).r);
-    vec3 color = vec3(samples.x, samples.y, samples.z);
+    vec3 color = vec3(samples.z, samples.z, samples.z);
 
-    color *= color_matrix;
+    //color *= color_matrix;
     vec3 gamma_color = pow(color, vec3(inv_gamma));
 
     gl_FragColor = vec4(gamma_color, 1);