#293429

CSS

:root {
  --terminal-black: #293429;
  --terminal-black-rgb: 41 52 41;
  --terminal-black-oklch: oklch(0.311 0.024 145);
}

.element {
  color: var(--terminal-black);
  background-color: hsl(120 12% 18%);
  border-color: oklch(0.311 0.024 145);
}

Tailwind CSS v4

@theme {
  --color-terminal-black: #293429;
  --color-terminal-black-50: #f1f7f1;
  --color-terminal-black-100: #e3eae3;
  --color-terminal-black-200: #ced7ce;
  --color-terminal-black-300: #b0bbb0;
  --color-terminal-black-400: #96a296;
  --color-terminal-black-500: #7d8b7c;
  --color-terminal-black-600: #697569;
  --color-terminal-black-700: #545e54;
  --color-terminal-black-800: #3e453d;
  --color-terminal-black-900: #2a2f2a;
  --color-terminal-black-950: #181c17;
}

SCSS

$terminal-black: #293429;
$terminal-black-rgb: 41, 52, 41;
$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);
}