#E2F0ED

CSS

:root {
  --second-wind: #e2f0ed;
  --second-wind-rgb: 226 240 237;
  --second-wind-oklch: oklch(0.944 0.015 181.8);
}

.element {
  color: var(--second-wind);
  background-color: hsl(167 32% 91%);
  border-color: oklch(0.944 0.015 181.8);
}

Tailwind CSS v4

@theme {
  --color-second-wind: #e2f0ed;
  --color-second-wind-50: #f1f7f5;
  --color-second-wind-100: #e3eae8;
  --color-second-wind-200: #cdd6d5;
  --color-second-wind-300: #afbab8;
  --color-second-wind-400: #95a29f;
  --color-second-wind-500: #7c8a87;
  --color-second-wind-600: #697472;
  --color-second-wind-700: #545d5b;
  --color-second-wind-800: #3d4442;
  --color-second-wind-900: #2a2f2e;
  --color-second-wind-950: #171c1b;
}

SCSS

$second-wind: #e2f0ed;
$second-wind-rgb: 226, 240, 237;
$second-wind-light: mix(#fff, $second-wind, 20%);
$second-wind-dark: mix(#000, $second-wind, 20%);

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