Error while painting site in tab bar?

Question

Web development

The key "ya-title" is not recognized and ignored.
The key "ya-dock" is not recognized and ignored.
Used changing tab color but didn't work. and also gives these errors in the browser console.
Yandex.Browser
head code:

<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
  <title>Название сайта</title>
  <meta content="теги" name="DESCRIPTION">
  <meta content="теги" name="KEYWORDS">
  <meta content="теги" name="ROBOTS">

  <!-- Chrome, Firefox OS and Opera -->

  <meta name="theme-color" content="#4285f4" >

  <!-- Windows Phone -->

  <meta name="msapplication-navbutton-color" content="#4285f4" >

  <!-- iOS Safari -->

  <meta name="apple-mobile-web-app-capable" content="yes" >
  <meta name="apple-mobile-web-app-status-bar-style" content="black-transcluent" >

  <!-- Яндекс.Браузер -->

  <meta name="viewport" content="ya-title=#000000,ya-dock=fade" >