nextcloud-server/core/css/css-variables.scss

// CSS4 Variables
// Remember, you cannot use scss functions with css4 variables
// All css4 variables must be fixed! Scss is a PRE processor
// css4 variables are processed after scss!
:root {
	--color-main-text: $color-main-text;
	--color-main-background: $color-main-background;
	--color-main-background-translucent: $color-main-background-translucent;

	--color-background-hover: $color-background-hover;
	--color-background-dark: $color-background-dark;
	--color-background-darker: $color-background-darker;

	--color-primary: $color-primary;
	--color-primary-light: $color-primary-light;
	--color-primary-text: $color-primary-text;
	--color-primary-text-dark: $color-primary-text-dark;
	--color-primary-element: $color-primary-element;
	--color-primary-element-light: $color-primary-element-light;

	--color-error: $color-error;
	--color-warning: $color-warning;
	--color-success: $color-success;

	--color-text-maxcontrast: $color-text-maxcontrast;
	--color-text-light: $color-main-text;
	--color-text-lighter: $color-text-maxcontrast;

	--image-logo: $image-logo;
	--image-login-background: $image-login-background;
	--image-logoheader: $image-logoheader;
	--image-favicon: $image-favicon;

	--color-loading-light: $color-loading-light;
	--color-loading-dark: $color-loading-dark;

	--color-box-shadow: $color-box-shadow;

	--color-border: $color-border;
	--color-border-dark: $color-border-dark;
	--border-radius: $border-radius;
	--border-radius-large: $border-radius-large;
	--border-radius-pill: $border-radius-pill;

	--font-face: $font-face;

	--animation-quick: $animation-quick;
	--animation-slow: $animation-slow;

	--header-height: $header-height;
}