You can find specific configs on this page needed to get the styling you see. It is mostly color and typography customizations.

_config.scss

scss
@use 'sass:color';
@use 'dark-colors' as dark;
$color-primary: hsl(262deg 71% 49%);
$color-primary-lightest: hsl(262deg 71% 98%);
$color-danger: hsl(0deg 71% 51%);
@use 'sprucecss/scss/spruce' with (
$btn: (
'font-family': #{'Manrope', sans-serif},
'font-weight': 600,
),
$btn-lg: (
'font-size': 1rem,
),
$colors: (
'base': (
'primary-lightest': $color-primary-lightest,
),
'breadcrumb': (
'separator': hsl(0deg 0% 80%),
),
'btn': (
'dark-background': hsl(205deg 100% 2%),
'dark-background-hover': hsl(205deg 100% 5%),
'dark-foreground': hsl(0deg 0% 100%),
'dark-outline-border': hsl(260deg 4% 70%),
'dark-outline-foreground': hsl(205deg 100% 2%),
'dark-outline-foreground-hover': hsl(0deg 0% 100%),
'dark-outline-background-hover': hsl(205deg 100% 2%),
'dark-outline-focus-ring': hsl(205deg 100% 2%),
'delete-background': color.adjust($color-danger, $lightness: 45%),
'delete-background-hover': $color-danger,
'delete-focus-ring': $color-danger,
'delete-foreground': $color-danger,
'delete-foreground-hover': hsl(0deg 0% 100%),
'light-background': $color-primary-lightest,
'light-background-hover': $color-primary,
'light-focus-ring': $color-primary,
'light-foreground': $color-primary,
'light-foreground-hover': hsl(0deg 0% 100%),
'pagination-background': hsl(263deg 40% 96%),
'pagination-background-hover': $color-primary,
'pagination-foreground': $color-primary,
'pagination-foreground-hover': hsl(0deg 0% 100%),
'pagination-focus-ring': $color-primary,
),
'combobox': (
'item-background': $color-primary-lightest,
'item-foreground': $color-primary,
),
'container': (
'background': hsl(0deg 0% 95%),
),
'footer': (
'background': hsl(215deg 100% 98%),
),
'invoice': (
'background': hsl(234deg 100% 98%),
),
'media': (
'background': $color-primary-lightest,
'dropzone-background': hsl(214deg 98% 49% / 75%),
'dropzone-border': hsl(214deg 98% 40%),
'icon': $color-primary,
),
'modal': (
'background': hsl(210deg 60% 98% / 90%),
),
'navigation': (
'icon-background': $color-primary-lightest,
'icon-background-hover': $color-primary,
'icon-foreground': $color-primary,
'icon-foreground-hover': hsl(0deg 0% 100%),
),
'tab': (
'background': hsl(222deg 100% 98%),
),
'search': (
'icon': hsl(229deg 26% 48% / 25%),
),
),
$dark-colors: dark.$colors,
$form-check: (
'font-weight': 400,
),
$form-label: (
'font-family': #{'Manrope', sans-serif},
'font-weight': 600,
),
$settings: (
'css-custom-properties': true,
'html-smooth-scrolling': false,
'print': true,
'utilities': (
'display': true,
'typography': true,
),
),
$typography: (
'font-family-base': #{'Open Sans', sans-serif},
'font-family-heading': #{'Manrope', sans-serif},
),
);

_dark-colors.scss

scss
@use 'sass:color';
$dark-color-black: hsl(206deg 100% 7%);
$dark-color-danger: hsl(0deg 71% 51%);
$dark-color-gray: hsl(0deg 0% 97%);
$dark-color-gray-dark: hsl(0deg 0% 100% / 8%);
$dark-color-primary: hsl(261deg 54% 70%);
$dark-color-secondary: hsl(227deg 92% 55%);
$dark-color-success: hsl(150deg 100% 33%);
$dark-color-white: hsl(0deg 0% 95%);
$colors: (
'base': (
'background': $dark-color-black,
'blockquote-border': $dark-color-primary,
'border': $dark-color-gray-dark,
'code-background': hsl(207deg 64% 18%),
'code-foreground': $dark-color-white,
'heading': $dark-color-white,
'link': $dark-color-primary,
'link-hover': color.scale($dark-color-primary, $lightness: 20%),
'mark-background': hsl(50deg 100% 80%),
'mark-foreground': $dark-color-black,
'marker': $dark-color-primary,
'primary': $dark-color-primary,
'secondary': $dark-color-secondary,
'strong': $dark-color-white,
'text': $dark-color-gray,
),
'breadcrumb': (
'arrow': hsl(0deg 0% 100% / 0.1),
),
'btn': (
'dark-background': hsl(0deg 0% 100%),
'dark-background-hover': hsl(0deg 0% 95%),
'dark-foreground': hsl(205deg 100% 5%),
'dark-outline-border': hsl(0 0% 100% / 15%),
'dark-outline-foreground': hsl(0deg 0% 100%),
'dark-outline-foreground-hover': hsl(205deg 100% 2%),
'dark-outline-background-hover': hsl(0deg 0% 100%),
'dark-outline-focus-ring': hsl(0deg 0% 100%),
'pagination-background': hsl(207deg 97% 12%),
'pagination-background-hover': hsl(261deg 52% 59%),
'pagination-focus-ring': hsl(261deg 52% 59%),
'pagination-foreground': hsl(0deg 0% 100%),
'pagination-foreground-hover': hsl(0deg 0% 100%),
'primary-background-hover': hsl(261deg 52% 65%),
'primary-background': hsl(261deg 52% 59%),
'primary-foreground': $dark-color-white,
'primary-shadow': color.adjust($dark-color-primary, $lightness: -25%),
'secondary-background': $dark-color-secondary,
'secondary-background-hover': color.adjust($dark-color-secondary, $lightness: 5%),
'secondary-foreground': $dark-color-white,
'secondary-shadow': color.adjust($dark-color-secondary, $lightness: -20%),
),
'container': (
'background': hsl(207deg 92% 12%),
),
'form': (
'background': color.scale($dark-color-black, $lightness: 5%),
'background-disabled': $dark-color-black,
'border': $dark-color-gray-dark,
'border-disabled': $dark-color-gray-dark,
'border-focus': $dark-color-primary,
'check-background': $dark-color-primary,
'check-focus-ring': $dark-color-primary,
'check-foreground': $dark-color-black,
'invalid': $dark-color-danger,
'invalid-focus-ring': color.adjust($dark-color-danger, $alpha: -0.75),
'label': $dark-color-white,
'legend': $dark-color-white,
'placeholder': hsl(0deg 0% 60%),
'range-thumb-background': $dark-color-primary,
'range-thumb-focus-ring': $dark-color-primary,
'range-track-background': $dark-color-gray-dark,
'ring-focus': color.adjust($dark-color-primary, $alpha: -0.75),
'select-foreground': hsl(0deg 0% 100%),
'text': $dark-color-gray,
'valid': $dark-color-success,
'valid-focus-ring': color.adjust($dark-color-success, $alpha: -0.75),
),
'footer': (
'background': hsl(207deg 97% 6%),
),
'invoice': (
'background': hsl(234deg 49% 6%),
),
'modal': (
'background': hsl(206deg 100% 3% / 90%),
),
'navigation': (
'icon-background': hsl(206deg 100% 12%),
'icon-background-hover': $dark-color-primary,
'icon-foreground': $dark-color-primary,
'icon-foreground-hover': hsl(206deg 100% 12%),
),
'tab': (
'background': hsl(240deg 3% 7% / 90%),
),
'search': (
'icon': hsl(0deg 0% 100% / 25%),
),
'selection': (
'background': $dark-color-primary,
'foreground': $dark-color-white,
),
'scrollbar': (
'thumb-background': hsl(0deg 0% 100% / 15%),
'thumb-background-hover': hsl(0deg 0% 100% / 25%),
'track-background': hsl(0deg 0% 100% / 5%),
),
'table': (
'border': $dark-color-gray-dark,
'caption': $dark-color-gray,
'heading': $dark-color-white,
'hover': hsl(0deg 0% 100% / 5%),
'text': $dark-color-gray,
'stripe': hsl(0deg 0% 100% / 2.5%),
),
);

_dark-mode.scss

scss
@use 'sprucecss/scss/spruce' as *;
@include generate-color-variables(
$dark-colors,
':root[data-theme-mode="dark"]'
);
[data-theme-mode='dark'] {
color-scheme: dark;
select.form-control:not([multiple]):not([size]) {
@include field-icon(
config('select', $form-icon, false),
color('select-foreground', 'form', true, $dark-colors)
);
}
}