#D4E3D4

CSS

:root {
  --misty-marsh: #d4e3d4;
  --misty-marsh-rgb: 212 227 212;
  --misty-marsh-oklch: oklch(0.9 0.026 145.4);
}

.element {
  color: var(--misty-marsh);
  background-color: hsl(120 21% 86%);
  border-color: oklch(0.9 0.026 145.4);
}

Tailwind CSS v4

@theme {
  --color-misty-marsh: #d4e3d4;
  --color-misty-marsh-50: #f0f7f1;
  --color-misty-marsh-100: #e2eae3;
  --color-misty-marsh-200: #cdd7ce;
  --color-misty-marsh-300: #afbbb0;
  --color-misty-marsh-400: #95a395;
  --color-misty-marsh-500: #7c8b7c;
  --color-misty-marsh-600: #697669;
  --color-misty-marsh-700: #545e54;
  --color-misty-marsh-800: #3d453d;
  --color-misty-marsh-900: #2a302a;
  --color-misty-marsh-950: #181c17;
}

SCSS

$misty-marsh: #d4e3d4;
$misty-marsh-rgb: 212, 227, 212;
$misty-marsh-light: mix(#fff, $misty-marsh, 20%);
$misty-marsh-dark: mix(#000, $misty-marsh, 20%);

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