#557F6D

CSS

:root {
  --clouded-pine: #557f6d;
  --clouded-pine-rgb: 85 127 109;
  --clouded-pine-oklch: oklch(0.56 0.055 165.9);
}

.element {
  color: var(--clouded-pine);
  background-color: hsl(154 20% 42%);
  border-color: oklch(0.56 0.055 165.9);
}

Tailwind CSS v4

@theme {
  --color-clouded-pine: #557f6d;
  --color-clouded-pine-50: #e7fbf2;
  --color-clouded-pine-100: #d7eee4;
  --color-clouded-pine-200: #bfdcd0;
  --color-clouded-pine-300: #9dc1b2;
  --color-clouded-pine-400: #80a997;
  --color-clouded-pine-500: #63927e;
  --color-clouded-pine-600: #547c6a;
  --color-clouded-pine-700: #436355;
  --color-clouded-pine-800: #30493d;
  --color-clouded-pine-900: #21322a;
  --color-clouded-pine-950: #101e18;
}

SCSS

$clouded-pine: #557f6d;
$clouded-pine-rgb: 85, 127, 109;
$clouded-pine-light: mix(#fff, $clouded-pine, 20%);
$clouded-pine-dark: mix(#000, $clouded-pine, 20%);

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