#D4E1D5

CSS

:root {
  --misty-marsh: #d4e1d5;
  --misty-marsh-rgb: 212 225 213;
  --misty-marsh-oklch: oklch(0.897 0.021 147.6);
}

.element {
  color: var(--misty-marsh);
  background-color: hsl(125 18% 86%);
  border-color: oklch(0.897 0.021 147.6);
}

Tailwind CSS v4

@theme {
  --color-misty-marsh: #d4e1d5;
  --color-misty-marsh-50: #f1f7f2;
  --color-misty-marsh-100: #e3eae4;
  --color-misty-marsh-200: #ced7cf;
  --color-misty-marsh-300: #b0bbb2;
  --color-misty-marsh-400: #96a297;
  --color-misty-marsh-500: #7d8a7e;
  --color-misty-marsh-600: #6a756b;
  --color-misty-marsh-700: #555e55;
  --color-misty-marsh-800: #3e443e;
  --color-misty-marsh-900: #2b2f2b;
  --color-misty-marsh-950: #181c18;
}

SCSS

$misty-marsh: #d4e1d5;
$misty-marsh-rgb: 212, 225, 213;
$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);
}