Deep Well

CSS

:root {
  --deep-well: #33313b;
  --deep-well-rgb: 51 49 59;
  --deep-well-oklch: oklch(0.319 0.018 294.5);
}

.element {
  color: var(--deep-well);
  background-color: hsl(252 9% 21%);
  border-color: oklch(0.319 0.018 294.5);
}

Tailwind CSS v4

@theme {
  --color-deep-well: #33313b;
  --color-deep-well-50: #f5f4fa;
  --color-deep-well-100: #e8e7ed;
  --color-deep-well-200: #d5d3db;
  --color-deep-well-300: #b8b6c0;
  --color-deep-well-400: #9f9da8;
  --color-deep-well-500: #878491;
  --color-deep-well-600: #72707b;
  --color-deep-well-700: #5b5962;
  --color-deep-well-800: #424148;
  --color-deep-well-900: #2e2d32;
  --color-deep-well-950: #1b1a1e;
}

SCSS

$deep-well: #33313b;
$deep-well-rgb: 51, 49, 59;
$deep-well-light: mix(#fff, $deep-well, 20%);
$deep-well-dark: mix(#000, $deep-well, 20%);

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