#9B9AA0

CSS

:root {
  --dark-ages: #9b9aa0;
  --dark-ages-rgb: 155 154 160;
  --dark-ages-oklch: oklch(0.689 0.009 293.8);
}

.element {
  color: var(--dark-ages);
  background-color: hsl(250 3% 62%);
  border-color: oklch(0.689 0.009 293.8);
}

Tailwind CSS v4

@theme {
  --color-dark-ages: #9b9aa0;
  --color-dark-ages-50: #f5f5f7;
  --color-dark-ages-100: #e8e7ea;
  --color-dark-ages-200: #d4d3d8;
  --color-dark-ages-300: #b7b6bb;
  --color-dark-ages-400: #9e9da3;
  --color-dark-ages-500: #86858c;
  --color-dark-ages-600: #727176;
  --color-dark-ages-700: #5b5a5e;
  --color-dark-ages-800: #424245;
  --color-dark-ages-900: #2e2d30;
  --color-dark-ages-950: #1b1a1c;
}

SCSS

$dark-ages: #9b9aa0;
$dark-ages-rgb: 155, 154, 160;
$dark-ages-light: mix(#fff, $dark-ages, 20%);
$dark-ages-dark: mix(#000, $dark-ages, 20%);

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