nextcloud-server/core/css/variables.scss

$color-main-text: #000000;
$color-main-background: #ffffff;
$color-primary: #0082c9;
$color-primary-text: #ffffff;
$color-error: #e9322d;
$color-warning: #eca700;
$color-success: #46ba61;
$color-primary-element: $color-primary;

// rgb(118, 118, 118) / #767676
// min. color contrast for normal text on white background according to WCAG AA
// (Works as well: color: #000; opacity: 0.57;)
$color-text-details: #767676;

@function nc-darken($color, $value) {
  @return darken($color, $value);
}

@function nc-lighten($color, $value) {
  @return lighten($color, $value);
}

$image-logo: '../img/logo.svg?v=1';
$image-login-background: '../img/background.png?v=2';

$color-loading: #969696;
$color-loading-dark: #bbbbbb;
$color-box-shadow: rgba(nc-darken($color-main-background, 70%), 0.75);
$color-border: nc-darken($color-main-background, 8%);
$border-radius: 3px;