What are these cookie parameters in Yii2?

Question

Yii

Hello!
I noticed that I have cookies of this format:

$_COOKIE = [
    '_locale' => '799218981e74ed118beab544e94c17ed6b817543a3120d07927300c39448f819a:2:{i:0;s:7:"_locale";i:1;s:5:"ru-RU";}',
    'size' => '4',
    'cP_cPM9s' => '',
    'cP_cPM8s' => '',
    'cP_cPM7s' => '',
    'cP_cPM6s' => '',
    'cP_cPM5s' => '',
    'cP_cPM4s' => '',
    'cP_cPM3s' => 'rgb(94| 173| 255)',
    'cP_cPM2s' => 'rgb(56| 140| 255)',
    'cP_cPM1s' => 'rgb(243|232|255)',
    'CP_mode' => 'B',
    '_csrf' => '07a9fbf86dcff866824799ea6d01125659c9d8c1a69eef1223bce8644a7881dd4a:2:{i:0;s:5:"_csrf";i:1;s:32:"hfI-Sqm-H-9oKTyP7bk6Wplxcw3gInoD";}',
    'PHPSESSID' => '9048ctm10srqh5hd9ssud0ci02',
];

I can't figure out what these 'cP_cPMXs' keys are, and also what are the RGB color codes?
And where can I turn it off if it's not something necessary?
Thanks in advance!

Answer 1

cP_cPMXs cookies are obviously not set by Yii, where they are set - it's hard to say. we do not know how your project is organized. Most likely they are put by some kind of extension from third-party developers.