Iron Grey

CSS

:root {
  --iron-grey: #7c7f7c;
  --iron-grey-rgb: 124 127 124;
  --iron-grey-oklch: oklch(0.593 0.006 145.5);
}

.element {
  color: var(--iron-grey);
  background-color: hsl(120 1% 49%);
  border-color: oklch(0.593 0.006 145.5);
}

Tailwind CSS v4

@theme {
  --color-iron-grey: #7c7f7c;
  --color-iron-grey-50: #f4f5f4;
  --color-iron-grey-100: #e7e8e7;
  --color-iron-grey-200: #d3d5d3;
  --color-iron-grey-300: #b5b8b6;
  --color-iron-grey-400: #9c9f9c;
  --color-iron-grey-500: #848784;
  --color-iron-grey-600: #707270;
  --color-iron-grey-700: #595b59;
  --color-iron-grey-800: #414341;
  --color-iron-grey-900: #2d2e2d;
  --color-iron-grey-950: #1a1b1a;
}

SCSS

$iron-grey: #7c7f7c;
$iron-grey-rgb: 124, 127, 124;
$iron-grey-light: mix(#fff, $iron-grey, 20%);
$iron-grey-dark: mix(#000, $iron-grey, 20%);

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