Nefarious Blue

CSS

:root {
  --nefarious-blue: #c5ced8;
  --nefarious-blue-rgb: 197 206 216;
  --nefarious-blue-oklch: oklch(0.847 0.017 250.9);
}

.element {
  color: var(--nefarious-blue);
  background-color: hsl(212 20% 81%);
  border-color: oklch(0.847 0.017 250.9);
}

Tailwind CSS v4

@theme {
  --color-nefarious-blue: #c5ced8;
  --color-nefarious-blue-50: #f2f5fa;
  --color-nefarious-blue-100: #e4e8ee;
  --color-nefarious-blue-200: #cfd5db;
  --color-nefarious-blue-300: #b1b8c0;
  --color-nefarious-blue-400: #979fa8;
  --color-nefarious-blue-500: #7e8791;
  --color-nefarious-blue-600: #6b727b;
  --color-nefarious-blue-700: #555c62;
  --color-nefarious-blue-800: #3e4348;
  --color-nefarious-blue-900: #2b2e32;
  --color-nefarious-blue-950: #181b1e;
}

SCSS

$nefarious-blue: #c5ced8;
$nefarious-blue-rgb: 197, 206, 216;
$nefarious-blue-light: mix(#fff, $nefarious-blue, 20%);
$nefarious-blue-dark: mix(#000, $nefarious-blue, 20%);

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