#AADAD7

CSS

:root {
  --catch-the-wave: #aadad7;
  --catch-the-wave-rgb: 170 218 215;
  --catch-the-wave-oklch: oklch(0.854 0.05 191.5);
}

.element {
  color: var(--catch-the-wave);
  background-color: hsl(176 39% 76%);
  border-color: oklch(0.854 0.05 191.5);
}

Tailwind CSS v4

@theme {
  --color-catch-the-wave: #aadad7;
  --color-catch-the-wave-50: #e6faf9;
  --color-catch-the-wave-100: #d6eeec;
  --color-catch-the-wave-200: #bddbda;
  --color-catch-the-wave-300: #9bc0bf;
  --color-catch-the-wave-400: #7ca8a6;
  --color-catch-the-wave-500: #5e918e;
  --color-catch-the-wave-600: #507b78;
  --color-catch-the-wave-700: #406260;
  --color-catch-the-wave-800: #2e4846;
  --color-catch-the-wave-900: #1f3230;
  --color-catch-the-wave-950: #0e1e1d;
}

SCSS

$catch-the-wave: #aadad7;
$catch-the-wave-rgb: 170, 218, 215;
$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);
}