#6F6C63

CSS

:root {
  --catch-of-the-day: #6f6c63;
  --catch-of-the-day-rgb: 111 108 99;
  --catch-of-the-day-oklch: oklch(0.531 0.014 91.6);
}

.element {
  color: var(--catch-of-the-day);
  background-color: hsl(45 6% 41%);
  border-color: oklch(0.531 0.014 91.6);
}

Tailwind CSS v4

@theme {
  --color-catch-of-the-day: #6f6c63;
  --color-catch-of-the-day-50: #f6f5f1;
  --color-catch-of-the-day-100: #e9e8e3;
  --color-catch-of-the-day-200: #d6d4ce;
  --color-catch-of-the-day-300: #bab7af;
  --color-catch-of-the-day-400: #a19e95;
  --color-catch-of-the-day-500: #89867c;
  --color-catch-of-the-day-600: #747169;
  --color-catch-of-the-day-700: #5d5b54;
  --color-catch-of-the-day-800: #44423d;
  --color-catch-of-the-day-900: #2f2e2a;
  --color-catch-of-the-day-950: #1c1a17;
}

SCSS

$catch-of-the-day: #6f6c63;
$catch-of-the-day-rgb: 111, 108, 99;
$catch-of-the-day-light: mix(#fff, $catch-of-the-day, 20%);
$catch-of-the-day-dark: mix(#000, $catch-of-the-day, 20%);

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