Refine theme.

Signal/src/ViewControllers/ConversationView/ConversationInputTextView.m

@@ -27,8 +27,8 @@ NS_ASSUME_NONNULL_BEGIN
 
         self.delegate = self;
 
-        self.backgroundColor = [UIColor ows_light02Color];
-        self.layer.borderColor = [UIColor.ows_blackColor colorWithAlphaComponent:0.12f].CGColor;
+        self.backgroundColor = (Theme.isDarkThemeEnabled ? UIColor.ows_dark95Color : UIColor.ows_light02Color);
+        self.layer.borderColor = [Theme.primaryColor colorWithAlphaComponent:0.12f].CGColor;
         self.layer.borderWidth = 0.5f;
 
         self.scrollIndicatorInsets = UIEdgeInsetsMake(4, 4, 4, 4);
@@ -38,7 +38,7 @@ NS_ASSUME_NONNULL_BEGIN
         self.userInteractionEnabled = YES;
 
         self.font = [UIFont ows_dynamicTypeBodyFont];
-        self.textColor = [UIColor blackColor];
+        self.textColor = Theme.primaryColor;
         self.textAlignment = NSTextAlignmentNatural;
 
         self.contentMode = UIViewContentModeRedraw;
@@ -48,7 +48,8 @@ NS_ASSUME_NONNULL_BEGIN
 
         self.placeholderView = [UILabel new];
         self.placeholderView.text = NSLocalizedString(@"new_message", @"");
-        self.placeholderView.textColor = UIColor.ows_light35Color;
+        self.placeholderView.textColor
+            = (Theme.isDarkThemeEnabled ? UIColor.ows_dark55Color : UIColor.ows_light35Color);
         self.placeholderView.userInteractionEnabled = NO;
         [self addSubview:self.placeholderView];
 

Signal/src/ViewControllers/ConversationView/ConversationScrollButton.m

@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
 //
 
 #import "ConversationScrollButton.h"
@@ -54,7 +54,6 @@ NS_ASSUME_NONNULL_BEGIN
     const CGFloat circleSize = self.class.circleSize;
     UIView *circleView = [UIView new];
     self.circleView = circleView;
-    circleView.backgroundColor = [UIColor colorWithWhite:0.95f alpha:1.f];
     circleView.userInteractionEnabled = NO;
     circleView.layer.cornerRadius = circleSize * 0.5f;
     circleView.layer.shadowColor = [UIColor colorWithWhite:0.5f alpha:1.f].CGColor;
@@ -81,15 +80,26 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (void)updateColors
 {
+    UIColor *foregroundColor;
+    UIColor *backgroundColor;
+    if (self.hasUnreadMessages) {
+        foregroundColor = UIColor.whiteColor;
+        backgroundColor = UIColor.ows_materialBlueColor;
+    } else if (Theme.isDarkThemeEnabled) {
+        foregroundColor = UIColor.ows_materialBlueColor;
+        backgroundColor = [UIColor colorWithWhite:0.25f alpha:1.f];
+    } else {
+        foregroundColor = UIColor.ows_materialBlueColor;
+        backgroundColor = [UIColor colorWithWhite:0.95f alpha:1.f];
+    }
+
     const CGFloat circleSize = self.class.circleSize;
-    self.circleView.backgroundColor
-        = (self.hasUnreadMessages ? [UIColor ows_materialBlueColor] : [UIColor colorWithWhite:0.95f alpha:1.f]);
-    self.iconLabel.attributedText = [[NSAttributedString alloc]
-        initWithString:self.iconText
+    self.circleView.backgroundColor = backgroundColor;
+    self.iconLabel.attributedText =
+        [[NSAttributedString alloc] initWithString:self.iconText
                                         attributes:@{
                                             NSFontAttributeName : [UIFont ows_fontAwesomeFont:circleSize * 0.8f],
-                NSForegroundColorAttributeName :
-                    (self.hasUnreadMessages ? [UIColor whiteColor] : [UIColor ows_materialBlueColor]),
+                                            NSForegroundColorAttributeName : foregroundColor,
                                             NSBaselineOffsetAttributeName : @(-0.5f),
                                         }];
 }

Signal/src/ViewControllers/CropScaleImageViewController.swift

@@ -141,8 +141,6 @@ import SignalMessaging
     override func viewDidLoad() {
         super.viewDidLoad()
 
-        view.backgroundColor = UIColor.white
-
         createViews()
     }
 
@@ -150,6 +148,8 @@ import SignalMessaging
 
     private func createViews() {
 
+        view.backgroundColor = UIColor.black
+
         let contentView = UIView()
         contentView.backgroundColor = UIColor.black
         self.view.addSubview(contentView)