UI: update hover color for buttons in call screen

Change-Id: I61fd43cd0357d8665b37ba226c066a96fc6f2da9

src/CurrentCallVC.mm

@@ -336,9 +336,9 @@ CVPixelBufferRef pixelBufferPreview;
 -(void) setUpButtons:(lrc::api::call::Info&)callInfo isRecording:(BOOL) isRecording {
     muteAudioButton.image = callInfo.audioMuted ? [NSImage imageNamed:@"micro_off.png"] :
     [NSImage imageNamed:@"micro_on.png"];
-    NSColor* audioImageColor = callInfo.audioMuted ? [NSColor redColor] : [NSColor whiteColor];
+    NSColor* audioImageColor = callInfo.audioMuted ? [NSColor callButtonRedColor] : [NSColor whiteColor];
     [self updateColorForButton: muteAudioButton color: audioImageColor];
-    NSColor* videoImageColor = callInfo.videoMuted ? [NSColor redColor] : [NSColor whiteColor];
+    NSColor* videoImageColor = callInfo.videoMuted ? [NSColor callButtonRedColor] : [NSColor whiteColor];
     [self updateColorForButton: muteVideoButton color: videoImageColor];
     muteVideoButton.image = callInfo.videoMuted ? [NSImage imageNamed:@"camera_off.png"] :
     [NSImage imageNamed:@"camera_on.png"];
@@ -1122,7 +1122,7 @@ CVPixelBufferRef pixelBufferPreview;
     auto& currentCall = callModel->getCall(callUid_);
     callModel->toggleMedia(callUid_, lrc::api::NewCallModel::Media::AUDIO);
     muteAudioButton.image = currentCall.audioMuted ? [NSImage imageNamed:@"micro_off.png"] : [NSImage imageNamed:@"micro_on.png"];
-    NSColor* audioImageColor = currentCall.audioMuted ? [NSColor redColor] : [NSColor whiteColor];
+    NSColor* audioImageColor = currentCall.audioMuted ? [NSColor callButtonRedColor] : [NSColor whiteColor];
     [self updateColorForButton: muteAudioButton color: audioImageColor];
 }
 
@@ -1144,7 +1144,7 @@ CVPixelBufferRef pixelBufferPreview;
     }
     callModel->toggleMedia(callUid_, lrc::api::NewCallModel::Media::VIDEO);
     muteVideoButton.image = currentCall.videoMuted ? [NSImage imageNamed:@"camera_off.png"] : [NSImage imageNamed:@"camera_on.png"];
-    NSColor* videoImageColor = currentCall.videoMuted ? [NSColor redColor] : [NSColor whiteColor];
+    NSColor* videoImageColor = currentCall.videoMuted ? [NSColor callButtonRedColor] : [NSColor whiteColor];
     [self updateColorForButton: muteVideoButton color: videoImageColor];
 }
 

src/views/NSColor+RingTheme.h

@@ -36,6 +36,7 @@
 + (NSColor*) presenceColor;
 + (NSColor*) unregisteredColor;
 + (NSColor*) buttonBlinkColorColor;
++ (NSColor*) callButtonRedColor;
 
 - (NSColor *)lightenColorByValue:(float)value;
 - (NSColor *)darkenColorByValue:(float)value;

src/views/NSColor+RingTheme.mm

@@ -85,6 +85,10 @@ return [NSColor colorWithCalibratedRed:59/255.0 green:193/255.0 blue:211/255.0 a
     return [NSColor colorWithCalibratedRed:76/255.0 green:217/255.0 blue:100/255.0 alpha:1];
 }
 
++ (NSColor*) callButtonRedColor
+{
+    return [NSColor colorWithCalibratedRed:144/255.0 green:27/255.0 blue:33/255.0 alpha:1];
+}
 
 - (NSColor *)lightenColorByValue:(float)value {
     if(![self isKindOfClass:[NSCalibratedRGBColorSpace class]]) {