Change color

Hello,

I've create a subtheme and it works.
I'd like to change default colors (top, footer, link, button...)

I've searched in the settings and find nothing.

In the color directory, I've found the color.inc file.
I've changed default value to adapt to my needs.

 // Pre-defined color schemes.
  'schemes' => [
    'default' => [
      'title' => t('Codial (default)'),
      'colors' => [
        'top' => '#055a8e',
        'bottom' => '#145c79',
        'bg' => '#ffffff',
        'sidebar' => '#f6f6f2',
        'sidebarborders' => '#f9f9f9',
        'footer' => '#145c79',
        'button' => '#d4ecf9',
        'buttonhover' => '#145c79',
        'titleslogan' => '#ffffff',
        'text' => '#3b3b3b',
        'link' => '#f6921e',
      ],
    ],
    'firehouse' => [
      'title' => t('Firehouse'),

I've cleared cache but nothing change. I've searched where I can defined color schemes but don't find.

How to do to change colors, I don't see information about it on https://www.drupal.org/docs/contributed-themes/barrio-bootstrap-45-drupa... → . The color module is deprecated.

Why the path of css is in default/files/css/css_strange_name and not those of my css theme ? I don't understand how to style it.

Thank you for your help