Use the NativeTheme to create the text color for text during the generated card animation.

chrome/browser/ui/views/autofill/autofill_dialog_views.cc

Index: chrome/browser/ui/views/autofill/autofill_dialog_views.cc
diff --git a/chrome/browser/ui/views/autofill/autofill_dialog_views.cc b/chrome/browser/ui/views/autofill/autofill_dialog_views.cc
index 7e10850cb555d126d0c76ec75018669b8a303175..04f33ac421cae5fb197bf8cf11dfcd60428667ec 100644
--- a/chrome/browser/ui/views/autofill/autofill_dialog_views.cc
+++ b/chrome/browser/ui/views/autofill/autofill_dialog_views.cc
@@ -35,6 +35,7 @@
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/animation/animation_delegate.h"
 #include "ui/gfx/canvas.h"
+#include "ui/gfx/color_utils.h"
 #include "ui/gfx/path.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/skia_util.h"
@@ -590,7 +591,9 @@ void AutofillDialogViews::OverlayView::UpdateState() {
   message_view_->SetVisible(!state.string.text.empty());
   message_view_->SetText(state.string.text);
   message_view_->SetFont(state.string.font);
-  message_view_->SetEnabledColor(state.string.text_color);
+  message_view_->SetEnabledColor(GetNativeTheme()->GetSystemColor(
+      ui::NativeTheme::kColorId_TextfieldReadOnlyColor));
+
   message_view_->set_border(
       views::Border::CreateEmptyBorder(kOverlayMessageVerticalPadding,
                                        kDialogEdgePadding,
@@ -654,10 +657,20 @@ void AutofillDialogViews::OverlayView::OnPaint(gfx::Canvas* canvas) {
     arrow.close();
 
     SkPaint paint;
-    paint.setColor(kShadingColor);
+    SkColor background_color = background()->get_color();
+    int background_luminance =
+        color_utils::GetLuminanceForColor(background_color);
+    int background_alpha = static_cast<int>(
+        7 + 15 * (255 - background_luminance) / 255);
+    int subtle_border_alpha = static_cast<int>(
+        10 + 20 * (255 - background_luminance) / 255);

[Evan Stade, 2014/01/03 02:00:55]

could you at least add some commentary to explain this wizardry

[Sheridan Rawlins, 2014/01/04 01:58:28]

Done.

+
+    paint.setColor(color_utils::BlendTowardOppositeLuminance(
+        background_color, background_alpha));
     paint.setStyle(SkPaint::kFill_Style);
     canvas->DrawPath(arrow, paint);
-    paint.setColor(kSubtleBorderColor);
+    paint.setColor(color_utils::BlendTowardOppositeLuminance(
+        background_color, subtle_border_alpha));
     paint.setStyle(SkPaint::kStroke_Style);
     canvas->DrawPath(arrow, paint);
   }