Oslo Blue

CSS

:root {
  --oslo-blue: #a6bdbe;
  --oslo-blue-rgb: 166 189 190;
  --oslo-blue-oklch: oklch(0.781 0.025 199.8);
}

.element {
  color: var(--oslo-blue);
  background-color: hsl(183 16% 70%);
  border-color: oklch(0.781 0.025 199.8);
}

Tailwind CSS v4

@theme {
  --color-oslo-blue: #a6bdbe;
  --color-oslo-blue-50: #edf7f8;
  --color-oslo-blue-100: #dfebeb;
  --color-oslo-blue-200: #c9d8d9;
  --color-oslo-blue-300: #a9bbbd;
  --color-oslo-blue-400: #8ea3a4;
  --color-oslo-blue-500: #738c8d;
  --color-oslo-blue-600: #627677;
  --color-oslo-blue-700: #4e5e5f;
  --color-oslo-blue-800: #394545;
  --color-oslo-blue-900: #273030;
  --color-oslo-blue-950: #151c1c;
}

SCSS

$oslo-blue: #a6bdbe;
$oslo-blue-rgb: 166, 189, 190;
$oslo-blue-light: mix(#fff, $oslo-blue, 20%);
$oslo-blue-dark: mix(#000, $oslo-blue, 20%);

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