#242F28

CSS

:root {
  --terminal-black: #242f28;
  --terminal-black-rgb: 36 47 40;
  --terminal-black-oklch: oklch(0.292 0.02 157);
}

.element {
  color: var(--terminal-black);
  background-color: hsl(142 13% 16%);
  border-color: oklch(0.292 0.02 157);
}

Tailwind CSS v4

@theme {
  --color-terminal-black: #242f28;
  --color-terminal-black-50: #f1f7f3;
  --color-terminal-black-100: #e3eae5;
  --color-terminal-black-200: #ced7d1;
  --color-terminal-black-300: #afbbb4;
  --color-terminal-black-400: #95a29a;
  --color-terminal-black-500: #7c8a81;
  --color-terminal-black-600: #69756d;
  --color-terminal-black-700: #545e57;
  --color-terminal-black-800: #3d443f;
  --color-terminal-black-900: #2a2f2c;
  --color-terminal-black-950: #181c19;
}

SCSS

$terminal-black: #242f28;
$terminal-black-rgb: 36, 47, 40;
$terminal-black-light: mix(#fff, $terminal-black, 20%);
$terminal-black-dark: mix(#000, $terminal-black, 20%);

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