Cool Grey

CSS

:root {
  --cool-grey: #8c93ad;
  --cool-grey-rgb: 140 147 173;
  --cool-grey-oklch: oklch(0.666 0.039 273.4);
}

.element {
  color: var(--cool-grey);
  background-color: hsl(227 17% 61%);
  border-color: oklch(0.666 0.039 273.4);
}

Tailwind CSS v4

@theme {
  --color-cool-grey: #8c93ad;
  --color-cool-grey-50: #f2f4ff;
  --color-cool-grey-100: #e4e7f5;
  --color-cool-grey-200: #cfd3e6;
  --color-cool-grey-300: #b1b6cc;
  --color-cool-grey-400: #979db6;
  --color-cool-grey-500: #7d85a1;
  --color-cool-grey-600: #6a7088;
  --color-cool-grey-700: #555a6d;
  --color-cool-grey-800: #3d4250;
  --color-cool-grey-900: #2a2d38;
  --color-cool-grey-950: #181a23;
}

SCSS

$cool-grey: #8c93ad;
$cool-grey-rgb: 140, 147, 173;
$cool-grey-light: mix(#fff, $cool-grey, 20%);
$cool-grey-dark: mix(#000, $cool-grey, 20%);

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