Eastern Blue

CSS

:root {
  --eastern-blue: #00879f;
  --eastern-blue-rgb: 0 135 159;
  --eastern-blue-oklch: oklch(0.574 0.102 216.1);
}

.element {
  color: var(--eastern-blue);
  background-color: hsl(189 100% 31%);
  border-color: oklch(0.574 0.102 216.1);
}

Tailwind CSS v4

@theme {
  --color-eastern-blue: #00879f;
  --color-eastern-blue-50: #d6fdff;
  --color-eastern-blue-100: #c3f1ff;
  --color-eastern-blue-200: #a3e0f2;
  --color-eastern-blue-300: #78c4da;
  --color-eastern-blue-400: #4badc5;
  --color-eastern-blue-500: #0096b1;
  --color-eastern-blue-600: #047f96;
  --color-eastern-blue-700: #076678;
  --color-eastern-blue-800: #014b58;
  --color-eastern-blue-900: #03343d;
  --color-eastern-blue-950: #001f27;
}

SCSS

$eastern-blue: #00879f;
$eastern-blue-rgb: 0, 135, 159;
$eastern-blue-light: mix(#fff, $eastern-blue, 20%);
$eastern-blue-dark: mix(#000, $eastern-blue, 20%);

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