#1E2310

CSS

:root {
  --midnight-pines: #1e2310;
  --midnight-pines-rgb: 30 35 16;
  --midnight-pines-oklch: oklch(0.245 0.034 121);
}

.element {
  color: var(--midnight-pines);
  background-color: hsl(76 37% 10%);
  border-color: oklch(0.245 0.034 121);
}

Tailwind CSS v4

@theme {
  --color-midnight-pines: #1e2310;
  --color-midnight-pines-50: #f3f7ec;
  --color-midnight-pines-100: #e5eade;
  --color-midnight-pines-200: #d1d7c7;
  --color-midnight-pines-300: #b4bba8;
  --color-midnight-pines-400: #9ba28c;
  --color-midnight-pines-500: #828a71;
  --color-midnight-pines-600: #6e7560;
  --color-midnight-pines-700: #585d4c;
  --color-midnight-pines-800: #414437;
  --color-midnight-pines-900: #2d2f26;
  --color-midnight-pines-950: #1a1c14;
}

SCSS

$midnight-pines: #1e2310;
$midnight-pines-rgb: 30, 35, 16;
$midnight-pines-light: mix(#fff, $midnight-pines, 20%);
$midnight-pines-dark: mix(#000, $midnight-pines, 20%);

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