#0091AD

CSS

:root {
  --munsell-blue: #0091ad;
  --munsell-blue-rgb: 0 145 173;
  --munsell-blue-oklch: oklch(0.606 0.109 217.9);
}

.element {
  color: var(--munsell-blue);
  background-color: hsl(190 100% 34%);
  border-color: oklch(0.606 0.109 217.9);
}

Tailwind CSS v4

@theme {
  --color-munsell-blue: #0091ad;
  --color-munsell-blue-50: #d4fdff;
  --color-munsell-blue-100: #c0f1ff;
  --color-munsell-blue-200: #a0e0f5;
  --color-munsell-blue-300: #74c5de;
  --color-munsell-blue-400: #43aec9;
  --color-munsell-blue-500: #0096b6;
  --color-munsell-blue-600: #007f99;
  --color-munsell-blue-700: #00667b;
  --color-munsell-blue-800: #004b5a;
  --color-munsell-blue-900: #00343f;
  --color-munsell-blue-950: #002028;
}

SCSS

$munsell-blue: #0091ad;
$munsell-blue-rgb: 0, 145, 173;
$munsell-blue-light: mix(#fff, $munsell-blue, 20%);
$munsell-blue-dark: mix(#000, $munsell-blue, 20%);

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