Blue Shale

CSS

:root {
  --blue-shale: #b9cacc;
  --blue-shale-rgb: 185 202 204;
  --blue-shale-oklch: oklch(0.827 0.019 205.3);
}

.element {
  color: var(--blue-shale);
  background-color: hsl(186 16% 76%);
  border-color: oklch(0.827 0.019 205.3);
}

Tailwind CSS v4

@theme {
  --color-blue-shale: #b9cacc;
  --color-blue-shale-50: #eff7f8;
  --color-blue-shale-100: #e1eaeb;
  --color-blue-shale-200: #ccd7d8;
  --color-blue-shale-300: #adbabc;
  --color-blue-shale-400: #92a2a4;
  --color-blue-shale-500: #788a8c;
  --color-blue-shale-600: #667577;
  --color-blue-shale-700: #515d5f;
  --color-blue-shale-800: #3b4445;
  --color-blue-shale-900: #292f30;
  --color-blue-shale-950: #161c1c;
}

SCSS

$blue-shale: #b9cacc;
$blue-shale-rgb: 185, 202, 204;
$blue-shale-light: mix(#fff, $blue-shale, 20%);
$blue-shale-dark: mix(#000, $blue-shale, 20%);

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