Catalyst Grey

CSS

:root {
  --catalyst-grey: #c5d0d5;
  --catalyst-grey-rgb: 197 208 213;
  --catalyst-grey-oklch: oklch(0.851 0.014 226.6);
}

.element {
  color: var(--catalyst-grey);
  background-color: hsl(199 16% 80%);
  border-color: oklch(0.851 0.014 226.6);
}

Tailwind CSS v4

@theme {
  --color-catalyst-grey: #c5d0d5;
  --color-catalyst-grey-50: #f1f6f8;
  --color-catalyst-grey-100: #e3e9eb;
  --color-catalyst-grey-200: #ced5d9;
  --color-catalyst-grey-300: #b0b9bd;
  --color-catalyst-grey-400: #96a0a5;
  --color-catalyst-grey-500: #7d888d;
  --color-catalyst-grey-600: #6a7378;
  --color-catalyst-grey-700: #555c60;
  --color-catalyst-grey-800: #3d4346;
  --color-catalyst-grey-900: #2a2f30;
  --color-catalyst-grey-950: #181b1d;
}

SCSS

$catalyst-grey: #c5d0d5;
$catalyst-grey-rgb: 197, 208, 213;
$catalyst-grey-light: mix(#fff, $catalyst-grey, 20%);
$catalyst-grey-dark: mix(#000, $catalyst-grey, 20%);

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