Error to inherit from a theme

Dear all,
Not sure if this is the right place.

I just create a new theme inherited from typhoon theme (premium).
can you please help me with the following error?

The very best.

Server Error

0 - Mexitek\PHPColors\Color::__construct(): Argument #1 ($hex) must be of type string, null given, called in C:\xampp\htdocs\des\user\plugins\color-tools\color-tools.php on line 65

Is color tools plugin a part of the Typhoon theme?

Thanks Karmalakas,
No idea.