#989AA4

CSS

:root {
  --dark-ages: #989aa4;
  --dark-ages-rgb: 152 154 164;
  --dark-ages-oklch: oklch(0.688 0.015 277);
}

.element {
  color: var(--dark-ages);
  background-color: hsl(230 6% 62%);
  border-color: oklch(0.688 0.015 277);
}

Tailwind CSS v4

@theme {
  --color-dark-ages: #989aa4;
  --color-dark-ages-50: #f4f5f9;
  --color-dark-ages-100: #e7e7ed;
  --color-dark-ages-200: #d3d4db;
  --color-dark-ages-300: #b5b7bf;
  --color-dark-ages-400: #9c9ea7;
  --color-dark-ages-500: #838590;
  --color-dark-ages-600: #6f717a;
  --color-dark-ages-700: #595a62;
  --color-dark-ages-800: #414248;
  --color-dark-ages-900: #2d2e32;
  --color-dark-ages-950: #1a1a1e;
}

SCSS

$dark-ages: #989aa4;
$dark-ages-rgb: 152, 154, 164;
$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);
}