Tetsu Iron

CSS

:root {
  --tetsu-iron: #455765;
  --tetsu-iron-rgb: 69 87 101;
  --tetsu-iron-oklch: oklch(0.447 0.032 241.8);
}

.element {
  color: var(--tetsu-iron);
  background-color: hsl(206 19% 33%);
  border-color: oklch(0.447 0.032 241.8);
}

Tailwind CSS v4

@theme {
  --color-tetsu-iron: #455765;
  --color-tetsu-iron-50: #eef6fe;
  --color-tetsu-iron-100: #dfe9f2;
  --color-tetsu-iron-200: #c9d6e1;
  --color-tetsu-iron-300: #aabac7;
  --color-tetsu-iron-400: #8ea1b0;
  --color-tetsu-iron-500: #74899a;
  --color-tetsu-iron-600: #627482;
  --color-tetsu-iron-700: #4e5d68;
  --color-tetsu-iron-800: #39444d;
  --color-tetsu-iron-900: #272f35;
  --color-tetsu-iron-950: #151c20;
}

SCSS

$tetsu-iron: #455765;
$tetsu-iron-rgb: 69, 87, 101;
$tetsu-iron-light: mix(#fff, $tetsu-iron, 20%);
$tetsu-iron-dark: mix(#000, $tetsu-iron, 20%);

.element {
  color: $tetsu-iron;
  box-shadow: 0 0 0 2px rgba($tetsu-iron, 0.35);
}