#706C63

CSS

:root {
  --catch-of-the-day: #706c63;
  --catch-of-the-day-rgb: 112 108 99;
  --catch-of-the-day-oklch: oklch(0.532 0.015 86.9);
}

.element {
  color: var(--catch-of-the-day);
  background-color: hsl(42 6% 41%);
  border-color: oklch(0.532 0.015 86.9);
}

Tailwind CSS v4

@theme {
  --color-catch-of-the-day: #706c63;
  --color-catch-of-the-day-50: #f7f5f0;
  --color-catch-of-the-day-100: #eae8e2;
  --color-catch-of-the-day-200: #d7d4cd;
  --color-catch-of-the-day-300: #bab7af;
  --color-catch-of-the-day-400: #a29e95;
  --color-catch-of-the-day-500: #8a867b;
  --color-catch-of-the-day-600: #757169;
  --color-catch-of-the-day-700: #5e5a54;
  --color-catch-of-the-day-800: #45423d;
  --color-catch-of-the-day-900: #2f2e2a;
  --color-catch-of-the-day-950: #1c1a17;
}

SCSS

$catch-of-the-day: #706c63;
$catch-of-the-day-rgb: 112, 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);
}