Dark Seashore Night

CSS

:root {
  --dark-seashore-night: #113691;
  --dark-seashore-night-rgb: 17 54 145;
  --dark-seashore-night-oklch: oklch(0.372 0.156 263.7);
}

.element {
  color: var(--dark-seashore-night);
  background-color: hsl(223 79% 32%);
  border-color: oklch(0.372 0.156 263.7);
}

Tailwind CSS v4

@theme {
  --color-dark-seashore-night: #113691;
  --color-dark-seashore-night-50: #e0f5ff;
  --color-dark-seashore-night-100: #cfe8ff;
  --color-dark-seashore-night-200: #b5d3ff;
  --color-dark-seashore-night-300: #91b5ff;
  --color-dark-seashore-night-400: #6e9bfa;
  --color-dark-seashore-night-500: #4e80ec;
  --color-dark-seashore-night-600: #436dc7;
  --color-dark-seashore-night-700: #3557a0;
  --color-dark-seashore-night-800: #224078;
  --color-dark-seashore-night-900: #172c54;
  --color-dark-seashore-night-950: #081939;
}

SCSS

$dark-seashore-night: #113691;
$dark-seashore-night-rgb: 17, 54, 145;
$dark-seashore-night-light: mix(#fff, $dark-seashore-night, 20%);
$dark-seashore-night-dark: mix(#000, $dark-seashore-night, 20%);

.element {
  color: $dark-seashore-night;
  box-shadow: 0 0 0 2px rgba($dark-seashore-night, 0.35);
}