HTMLBackground.m

// Tweak background styling
UIColor *backgroundColor = [UIColor whiteColor];
HTMLDocument *document = [HTMLDocument documentWithString:htmlString];
htmlString = [[document rootElement] serializedFragment];

// Fetch the body tag to look for inline background styles
HTMLElement *body = [document firstNodeMatchingSelector:@"body"];
if ( [body attributes] && [[body attributes] count] ) {
    Boolean foundColor = NO;
    
    // Find either an inline CSS style attribute, or an HTML bgcolor attribute
    NSString *styles = [[body attributes] objectForKey:@"style"];
    NSString *bgcolor = [[body attributes] objectForKey:@"bgcolor"];
    if ( !foundColor && styles && [styles length] ) {
        NSArray *keyValueList = [styles componentsSeparatedByString:@";"];
        
        // Iterate through each css style to find a background color
        for (NSString *item in keyValueList) {
            if ( [item containsString:@"background"] && [item containsString:@"#"] ) {
                NSRange range = [item rangeOfString:@"#"];
                backgroundColor = [UIColor colorWithHexString:[item substringFromIndex:range.location+1]];
                foundColor = YES;
            }
        }
    }
    
    // If no CSS color exists, try the HTML bgcolor attribute instead
    if ( !foundColor && bgcolor && [bgcolor length] ) {
        backgroundColor = [UIColor colorWithHexString:[bgcolor substringFromIndex:1]];
        foundColor = YES;
    }
}