#667E4E

CSS

:root {
  --beyond-the-pines: #667e4e;
  --beyond-the-pines-rgb: 102 126 78;
  --beyond-the-pines-oklch: oklch(0.561 0.076 130.1);
}

.element {
  color: var(--beyond-the-pines);
  background-color: hsl(90 24% 40%);
  border-color: oklch(0.561 0.076 130.1);
}

Tailwind CSS v4

@theme {
  --color-beyond-the-pines: #667e4e;
  --color-beyond-the-pines-50: #edfae4;
  --color-beyond-the-pines-100: #dfeed4;
  --color-beyond-the-pines-200: #c8dcbb;
  --color-beyond-the-pines-300: #a9c098;
  --color-beyond-the-pines-400: #90a879;
  --color-beyond-the-pines-500: #75905a;
  --color-beyond-the-pines-600: #647a4d;
  --color-beyond-the-pines-700: #4f623d;
  --color-beyond-the-pines-800: #3b472b;
  --color-beyond-the-pines-900: #28321d;
  --color-beyond-the-pines-950: #161d0d;
}

SCSS

$beyond-the-pines: #667e4e;
$beyond-the-pines-rgb: 102, 126, 78;
$beyond-the-pines-light: mix(#fff, $beyond-the-pines, 20%);
$beyond-the-pines-dark: mix(#000, $beyond-the-pines, 20%);

.element {
  color: $beyond-the-pines;
  box-shadow: 0 0 0 2px rgba($beyond-the-pines, 0.35);
}