Как проще всего сделать светлую тему на основе темной с глубокой кастомизацией

[Moin]

You can add a light color palette to your theme

You can update colors based on whether the light or dark theme is used:

@awesomerobot

So in color_definitions.scss you can do:

$my-theme-color: dark-light-choose($primary, red);

:root {
  --my-theme-color: #{$my-theme-color};
}

and then you’d use the new dark/light changing custom property in your theme:

body {
  color: var(--my-theme-color);
}