#ACD6D4

CSS

:root {
  --catch-the-wave: #acd6d4;
  --catch-the-wave-rgb: 172 214 212;
  --catch-the-wave-oklch: oklch(0.846 0.044 192.8);
}

.element {
  color: var(--catch-the-wave);
  background-color: hsl(177 34% 76%);
  border-color: oklch(0.846 0.044 192.8);
}

Tailwind CSS v4

@theme {
  --color-catch-the-wave: #acd6d4;
  --color-catch-the-wave-50: #e8f9f9;
  --color-catch-the-wave-100: #d8edec;
  --color-catch-the-wave-200: #c0dbda;
  --color-catch-the-wave-300: #9ebfbe;
  --color-catch-the-wave-400: #81a7a5;
  --color-catch-the-wave-500: #63908e;
  --color-catch-the-wave-600: #557a78;
  --color-catch-the-wave-700: #436160;
  --color-catch-the-wave-800: #304746;
  --color-catch-the-wave-900: #213130;
  --color-catch-the-wave-950: #101d1d;
}

SCSS

$catch-the-wave: #acd6d4;
$catch-the-wave-rgb: 172, 214, 212;
$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);
}