diff --git a/cmd/gogio/js_test.go b/cmd/gogio/js_test.go
index a04f2796..2c91fc18 100644
--- a/cmd/gogio/js_test.go
+++ b/cmd/gogio/js_test.go
@@ -127,8 +127,8 @@ func TestJSOnChrome(t *testing.T) {
 		t.Fatalf("expected dimensions to be %d*%d, got %d*%d",
 			wantSize, wantSize, size.X, size.Y)
 	}
-	wantColor(t, img, 5, 5, 0xffff, 0x0, 0x0)
-	wantColor(t, img, 595, 595, 0xffff, 0x0, 0x0)
+	wantColor(t, img, 5, 5, 0xdede, 0xadad, 0xbebe)
+	wantColor(t, img, 595, 595, 0xdede, 0xadad, 0xbebe)
 }
 
 func wantColor(t *testing.T, img image.Image, x, y int, r, g, b uint32) {
diff --git a/cmd/gogio/testdata/red.go b/cmd/gogio/testdata/red.go
index 481b6a31..819f89e4 100644
--- a/cmd/gogio/testdata/red.go
+++ b/cmd/gogio/testdata/red.go
@@ -25,7 +25,7 @@ func main() {
 }
 
 func loop(w *app.Window) error {
-	background := color.RGBA{255, 0, 0, 255}
+	background := color.RGBA{R: 0xde, G: 0xad, B: 0xbe, A: 0xff}
 	ops := new(op.Ops)
 	for {
 		e := <-w.Events()
diff --git a/cmd/gogio/x11_test.go b/cmd/gogio/x11_test.go
index 337e2118..9d26987d 100644
--- a/cmd/gogio/x11_test.go
+++ b/cmd/gogio/x11_test.go
@@ -170,7 +170,7 @@ func TestX11(t *testing.T) {
 			t.Fatalf("expected dimensions to be %d*%d, got %d*%d",
 				wantSize, wantSize, size.X, size.Y)
 		}
-		wantColor(t, img, 5, 5, 0xffff, 0x0, 0x0)
-		wantColor(t, img, 595, 595, 0xffff, 0x0, 0x0)
+		wantColor(t, img, 5, 5, 0xdede, 0xadad, 0xbebe)
+		wantColor(t, img, 595, 595, 0xdede, 0xadad, 0xbebe)
 	}
 }