Summer Concrete

CSS

:root {
  --summer-concrete: #57595d;
  --summer-concrete-rgb: 87 89 93;
  --summer-concrete-oklch: oklch(0.464 0.007 264.5);
}

.element {
  color: var(--summer-concrete);
  background-color: hsl(220 3% 35%);
  border-color: oklch(0.464 0.007 264.5);
}

Tailwind CSS v4

@theme {
  --color-summer-concrete: #57595d;
  --color-summer-concrete-50: #f4f5f7;
  --color-summer-concrete-100: #e7e8ea;
  --color-summer-concrete-200: #d3d4d7;
  --color-summer-concrete-300: #b6b7bb;
  --color-summer-concrete-400: #9c9ea3;
  --color-summer-concrete-500: #84868b;
  --color-summer-concrete-600: #707275;
  --color-summer-concrete-700: #595b5e;
  --color-summer-concrete-800: #414245;
  --color-summer-concrete-900: #2d2e30;
  --color-summer-concrete-950: #1a1b1c;
}

SCSS

$summer-concrete: #57595d;
$summer-concrete-rgb: 87, 89, 93;
$summer-concrete-light: mix(#fff, $summer-concrete, 20%);
$summer-concrete-dark: mix(#000, $summer-concrete, 20%);

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