Android:ActionBar
ActionBar의 Title Text 색상변경 방법
아래와 같이 Html.fromHtml()를 사용하여 Activity.setTitle(CharSequence title)에 적용하면 된다.
final String openFontTag = "<font color='white'>";
final String title = getString(R.string.agree_terms_for_use_and_privacy_title);
final String closeFontTag = "</font>";
final String titleHtmlString = openFontTag + title + closeFontTag;
setTitle(Html.fromHtml(titleHtmlString));