#BBE4DF

CSS

:root {
  --catch-the-wave: #bbe4df;
  --catch-the-wave-rgb: 187 228 223;
  --catch-the-wave-oklch: oklch(0.888 0.043 187.3);
}

.element {
  color: var(--catch-the-wave);
  background-color: hsl(173 43% 81%);
  border-color: oklch(0.888 0.043 187.3);
}

Tailwind CSS v4

@theme {
  --color-catch-the-wave: #bbe4df;
  --color-catch-the-wave-50: #e8f9f8;
  --color-catch-the-wave-100: #d9edeb;
  --color-catch-the-wave-200: #c0dbd8;
  --color-catch-the-wave-300: #9fbfbc;
  --color-catch-the-wave-400: #82a7a3;
  --color-catch-the-wave-500: #65908b;
  --color-catch-the-wave-600: #567a76;
  --color-catch-the-wave-700: #44615e;
  --color-catch-the-wave-800: #314744;
  --color-catch-the-wave-900: #21312f;
  --color-catch-the-wave-950: #111d1c;
}

SCSS

$catch-the-wave: #bbe4df;
$catch-the-wave-rgb: 187, 228, 223;
$catch-the-wave-light: mix(#fff, $catch-the-wave, 20%);
$catch-the-wave-dark: mix(#000, $catch-the-wave, 20%);

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