function updateBackgroundColor (cordovaProject, locations) {
    const platformProjDir = path.relative(cordovaProject.root, locations.xcodeCordovaProj);

    const pref = cordovaProject.projectConfig.getPreference('BackgroundColor', 'ios') || '';
    const splashPref = cordovaProject.projectConfig.getPreference('SplashScreenBackgroundColor', 'ios') || pref;
    const statusBarPref = cordovaProject.projectConfig.getPreference('StatusBarBackgroundColor', 'ios') || pref;

    const backgroundColorDir = getBackgroundColorDir(cordovaProject.root, platformProjDir);
    if (backgroundColorDir) {
        const contentsJSON = {
            colors: [{
                idiom: 'universal',
                color: colorPreferenceToComponents(pref)
            }],
            info: {
                author: 'Xcode',
                version: 1
            }
        };

        events.emit('verbose', 'Updating Background Color color set Contents.json');
        fs.writeFileSync(path.join(cordovaProject.root, backgroundColorDir, 'Contents.json'),
            JSON.stringify(contentsJSON, null, 2));
    }

    const splashBackgroundColorDir = getSplashScreenBackgroundColorDir(cordovaProject.root, platformProjDir);
    if (splashBackgroundColorDir) {
        const contentsJSON = {
            colors: [{
                idiom: 'universal',
                color: colorPreferenceToComponents(splashPref)
            }],
            info: {
                author: 'Xcode',
                version: 1
            }
        };

        events.emit('verbose', 'Updating Splash Screen Background Color color set Contents.json');
        fs.writeFileSync(path.join(cordovaProject.root, splashBackgroundColorDir, 'Contents.json'),
            JSON.stringify(contentsJSON, null, 2));
    }

    const statusBarBackgroundColorDir = getStatusBarBackgroundColorDir(cordovaProject.root, platformProjDir);
    if (statusBarBackgroundColorDir) {
        const contentsJSON = {
            colors: [{
                idiom: 'universal',
                color: colorPreferenceToComponents(statusBarPref)
            }],
            info: {
                author: 'Xcode',
                version: 1
            }
        };

        events.emit('verbose', 'Updating Status Bar Background Color color set Contents.json');
        fs.writeFileSync(path.join(cordovaProject.root, statusBarBackgroundColorDir, 'Contents.json'),
            JSON.stringify(contentsJSON, null, 2));
    }
}
Update the background color Contents.json in xcassets.

@param {Object} cordovaProject The cordova project
@param {Object} locations A dictionary containing useful location paths