Refine theme.

Signal/src/ViewControllers/MessageDetailViewController.swift

@@ -130,7 +130,7 @@ class MessageDetailViewController: OWSViewController, MediaGalleryDataSourceDele
     // MARK: - Create Views
 
     private func createViews() {
-        view.backgroundColor = UIColor.white
+        view.backgroundColor = Theme.backgroundColor
 
         let scrollView = UIScrollView()
         self.scrollView = scrollView
@@ -222,7 +222,7 @@ class MessageDetailViewController: OWSViewController, MediaGalleryDataSourceDele
                 // TODO: It'd be nice to inset these dividers from the edge of the screen.
                 let addDivider = {
                     let divider = UIView()
-                    divider.backgroundColor = UIColor(white: 0.9, alpha: 1.0)
+                    divider.backgroundColor = Theme.secondaryColor
                     divider.autoSetDimension(.height, toSize: 0.5)
                     groupRows.append(divider)
                 }
@@ -458,7 +458,7 @@ class MessageDetailViewController: OWSViewController, MediaGalleryDataSourceDele
 
     private func nameLabel(text: String) -> UILabel {
         let label = UILabel()
-        label.textColor = UIColor.black
+        label.textColor = Theme.primaryColor
         label.font = UIFont.ows_mediumFont(withSize: 14)
         label.text = text
         label.setContentHuggingHorizontalHigh()
@@ -467,7 +467,7 @@ class MessageDetailViewController: OWSViewController, MediaGalleryDataSourceDele
 
     private func valueLabel(text: String) -> UILabel {
         let label = UILabel()
-        label.textColor = UIColor.black
+        label.textColor = Theme.primaryColor
         label.font = UIFont.ows_regularFont(withSize: 14)
         label.text = text
         label.setContentHuggingHorizontalLow()
@@ -488,7 +488,7 @@ class MessageDetailViewController: OWSViewController, MediaGalleryDataSourceDele
 
         if subtitle.count > 0 {
             let subtitleLabel = self.valueLabel(text: subtitle)
-            subtitleLabel.textColor = UIColor.ows_darkGray
+            subtitleLabel.textColor = Theme.secondaryColor
             row.addSubview(subtitleLabel)
             subtitleLabel.autoPinTrailingToSuperviewMargin()
             subtitleLabel.autoPinLeading(toTrailingEdgeOf: nameLabel, offset: 10)

Signal/src/ViewControllers/OWS2FAReminderViewController.swift

@@ -35,7 +35,7 @@ public class OWS2FAReminderViewController: UIViewController, PinEntryViewDelegat
 
         let view = UIView()
         self.view = view
-        view.backgroundColor = .white
+        view.backgroundColor = Theme.backgroundColor
 
         let pinEntryView = PinEntryView()
         self.pinEntryView = pinEntryView

Signal/src/ViewControllers/ProfileViewController.m

@@ -89,10 +89,11 @@ NSString *const kProfileView_LastPresentedDate = @"kProfileView_LastPresentedDat
 
 - (void)createViews
 {
-    self.view.backgroundColor = [UIColor colorWithRGBHex:0xefeff4];
+    self.view.backgroundColor
+        = (Theme.isDarkThemeEnabled ? [UIColor colorWithRGBHex:0x202020] : [UIColor colorWithRGBHex:0xefeff4]);
 
     UIView *contentView = [UIView containerView];
-    contentView.backgroundColor = [UIColor whiteColor];
+    contentView.backgroundColor = Theme.backgroundColor;
     [self.view addSubview:contentView];
     [contentView autoPinToTopLayoutGuideOfViewController:self withInset:0];
     [contentView autoPinWidthToSuperview];
@@ -111,7 +112,7 @@ NSString *const kProfileView_LastPresentedDate = @"kProfileView_LastPresentedDat
     UILabel *nameLabel = [UILabel new];
     nameLabel.text = NSLocalizedString(
         @"PROFILE_VIEW_PROFILE_NAME_FIELD", @"Label for the profile name field of the profile view.");
-    nameLabel.textColor = [UIColor blackColor];
+    nameLabel.textColor = Theme.primaryColor;
     nameLabel.font = [UIFont ows_mediumFontWithSize:fontSizePoints];
     [nameRow addSubview:nameLabel];
     [nameLabel autoPinLeadingToSuperviewMargin];
@@ -149,7 +150,7 @@ NSString *const kProfileView_LastPresentedDate = @"kProfileView_LastPresentedDat
     UILabel *avatarLabel = [UILabel new];
     avatarLabel.text = NSLocalizedString(
         @"PROFILE_VIEW_PROFILE_AVATAR_FIELD", @"Label for the profile avatar field of the profile view.");
-    avatarLabel.textColor = [UIColor blackColor];
+    avatarLabel.textColor = Theme.primaryColor;
     avatarLabel.font = [UIFont ows_mediumFontWithSize:fontSizePoints];
     [avatarRow addSubview:avatarLabel];
     [avatarLabel autoPinLeadingToSuperviewMargin];
@@ -183,7 +184,7 @@ NSString *const kProfileView_LastPresentedDate = @"kProfileView_LastPresentedDat
     [rows addObject:infoRow];
 
     UILabel *infoLabel = [UILabel new];
-    infoLabel.textColor = [UIColor ows_darkGrayColor];
+    infoLabel.textColor = Theme.secondaryColor;
     infoLabel.font = [UIFont ows_regularFontWithSize:11.f];
     infoLabel.textAlignment = NSTextAlignmentCenter;
     NSMutableAttributedString *text = [NSMutableAttributedString new];
@@ -249,8 +250,7 @@ NSString *const kProfileView_LastPresentedDate = @"kProfileView_LastPresentedDat
 
         if (lastRow == nameRow || lastRow == avatarRow) {
             UIView *separator = [UIView containerView];
-            separator.backgroundColor = [UIColor colorWithWhite:0.9f alpha:1.f];
-            [contentView addSubview:separator];
+            separator.backgroundColor = Theme.secondaryColor [contentView addSubview:separator];
             [separator autoPinEdge:ALEdgeTop toEdge:ALEdgeBottom ofView:lastRow withOffset:5.f];
             [separator autoPinLeadingToSuperviewMarginWithInset:18.f];
             [separator autoPinTrailingToSuperviewMarginWithInset:18.f];
@@ -356,7 +356,7 @@ NSString *const kProfileView_LastPresentedDate = @"kProfileView_LastPresentedDat
     } else {
         self.saveButton.enabled = NO;
         [self.saveButton
-            setBackgroundColorsWithUpColor:[[UIColor ows_signalBrandBlueColor] blendWithColor:[UIColor whiteColor]
+            setBackgroundColorsWithUpColor:[[UIColor ows_signalBrandBlueColor] blendWithColor:Theme.backgroundColor
                                                                                         alpha:0.5f]];
     }
 }