#E6E1D4

CSS

:root {
  --helium: #e6e1d4;
  --helium-rgb: 230 225 212;
  --helium-oklch: oklch(0.91 0.018 89.4);
}

.element {
  color: var(--helium);
  background-color: hsl(43 26% 87%);
  border-color: oklch(0.91 0.018 89.4);
}

Tailwind CSS v4

@theme {
  --color-helium: #e6e1d4;
  --color-helium-50: #f7f5ef;
  --color-helium-100: #eae8e1;
  --color-helium-200: #d7d4cc;
  --color-helium-300: #bbb7ad;
  --color-helium-400: #a39e93;
  --color-helium-500: #8b8679;
  --color-helium-600: #757166;
  --color-helium-700: #5e5b52;
  --color-helium-800: #45423b;
  --color-helium-900: #302e29;
  --color-helium-950: #1c1a17;
}

SCSS

$helium: #e6e1d4;
$helium-rgb: 230, 225, 212;
$helium-light: mix(#fff, $helium, 20%);
$helium-dark: mix(#000, $helium, 20%);

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