To change how a chat screen looks like, you can use one of the three methods. They will return the instance of HCSTheme, which you can configure in any way you want.

HelpCrunch.h
+ (HCSTheme *)lightTheme;
+ (HCSTheme *)darkTheme;

Default Light theme:

Dark theme:

After you make all necessary changes you want, use + (void)bindTheme:(HCSTheme *)theme; to apply your custom theme to the SDK. For instance:

ObjC:

HCSTheme *theme = [HelpCrunch lightTheme];
theme.chatArea.dateColor = [UIColor redColor];
[HelpCrunch bindTheme:theme];

Swift:

let theme = HelpCrunch.lightTheme()
theme.chatArea.dateColor = UIColor.red
HelpCrunch.bindTheme(theme)