#0097B4

CSS

:root {
  --munsell-blue: #0097b4;
  --munsell-blue-rgb: 0 151 180;
  --munsell-blue-oklch: oklch(0.624 0.112 217.8);
}

.element {
  color: var(--munsell-blue);
  background-color: hsl(190 100% 35%);
  border-color: oklch(0.624 0.112 217.8);
}

Tailwind CSS v4

@theme {
  --color-munsell-blue: #0097b4;
  --color-munsell-blue-50: #d3fdff;
  --color-munsell-blue-100: #bff1ff;
  --color-munsell-blue-200: #9ee0f5;
  --color-munsell-blue-300: #71c5df;
  --color-munsell-blue-400: #3eaeca;
  --color-munsell-blue-500: #0097b7;
  --color-munsell-blue-600: #00809a;
  --color-munsell-blue-700: #00667c;
  --color-munsell-blue-800: #004b5b;
  --color-munsell-blue-900: #003440;
  --color-munsell-blue-950: #002028;
}

SCSS

$munsell-blue: #0097b4;
$munsell-blue-rgb: 0, 151, 180;
$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);
}