Impression of Obscurity

CSS

:root {
  --impression-of-obscurity: #1a2578;
  --impression-of-obscurity-rgb: 26 37 120;
  --impression-of-obscurity-oklch: oklch(0.318 0.14 270.1);
}

.element {
  color: var(--impression-of-obscurity);
  background-color: hsl(233 64% 29%);
  border-color: oklch(0.318 0.14 270.1);
}

Tailwind CSS v4

@theme {
  --color-impression-of-obscurity: #1a2578;
  --color-impression-of-obscurity-50: #e7f4ff;
  --color-impression-of-obscurity-100: #d7e6ff;
  --color-impression-of-obscurity-200: #bfd1ff;
  --color-impression-of-obscurity-300: #9eb3ff;
  --color-impression-of-obscurity-400: #7e99f1;
  --color-impression-of-obscurity-500: #637ee2;
  --color-impression-of-obscurity-600: #546bbf;
  --color-impression-of-obscurity-700: #435599;
  --color-impression-of-obscurity-800: #2e3f73;
  --color-impression-of-obscurity-900: #1f2b51;
  --color-impression-of-obscurity-950: #0f1836;
}

SCSS

$impression-of-obscurity: #1a2578;
$impression-of-obscurity-rgb: 26, 37, 120;
$impression-of-obscurity-light: mix(#fff, $impression-of-obscurity, 20%);
$impression-of-obscurity-dark: mix(#000, $impression-of-obscurity, 20%);

.element {
  color: $impression-of-obscurity;
  box-shadow: 0 0 0 2px rgba($impression-of-obscurity, 0.35);
}