Warning: Trying to access array offset on value of type null in Drupal\color\ColorThemeDecorator->getPalette() (line 411 of modules/contrib/color/src/ColorThemeDecorator.php).

Hello, @AnzyKronus,

I can't reproduce this issue because I couldn't find the ColorThemeDecorator.php class in this module.

File ColorThemeDecorator.php is not listed.

Hi, @AnzyKronus it's an issue with the contrib color module to resolve it need inside your current theme create the directory "color" with file color.inc

and add something like this

$info = [
  'schemes' => [
    'default' => [
      'colors' => [],
    ],
  ],
];

I can also confirm we're running into

Trying to access array offset on value of type null in color_get_palette()

using the social (Open Social) distribution in version 12.4.2

Solution in #5 solves the issue!
Thank you @Tao