#757775

CSS

:root {
  --lucky-grey: #757775;
  --lucky-grey-rgb: 117 119 117;
  --lucky-grey-oklch: oklch(0.567 0.004 145.5);
}

.element {
  color: var(--lucky-grey);
  background-color: hsl(120 1% 46%);
  border-color: oklch(0.567 0.004 145.5);
}

Tailwind CSS v4

@theme {
  --color-lucky-grey: #757775;
  --color-lucky-grey-50: #f4f5f4;
  --color-lucky-grey-100: #e7e8e7;
  --color-lucky-grey-200: #d3d5d3;
  --color-lucky-grey-300: #b6b8b6;
  --color-lucky-grey-400: #9d9f9d;
  --color-lucky-grey-500: #858785;
  --color-lucky-grey-600: #707270;
  --color-lucky-grey-700: #5a5b5a;
  --color-lucky-grey-800: #424341;
  --color-lucky-grey-900: #2d2e2d;
  --color-lucky-grey-950: #1a1b1a;
}

SCSS

$lucky-grey: #757775;
$lucky-grey-rgb: 117, 119, 117;
$lucky-grey-light: mix(#fff, $lucky-grey, 20%);
$lucky-grey-dark: mix(#000, $lucky-grey, 20%);

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