#ADE0DD

CSS

:root {
  --catch-the-wave: #ade0dd;
  --catch-the-wave-rgb: 173 224 221;
  --catch-the-wave-oklch: oklch(0.87 0.053 191.7);
}

.element {
  color: var(--catch-the-wave);
  background-color: hsl(176 45% 78%);
  border-color: oklch(0.87 0.053 191.7);
}

Tailwind CSS v4

@theme {
  --color-catch-the-wave: #ade0dd;
  --color-catch-the-wave-50: #e5faf9;
  --color-catch-the-wave-100: #d5eeed;
  --color-catch-the-wave-200: #bbdcdb;
  --color-catch-the-wave-300: #99c0bf;
  --color-catch-the-wave-400: #7aa9a6;
  --color-catch-the-wave-500: #5b928f;
  --color-catch-the-wave-600: #4e7b79;
  --color-catch-the-wave-700: #3e6361;
  --color-catch-the-wave-800: #2c4846;
  --color-catch-the-wave-900: #1e3231;
  --color-catch-the-wave-950: #0e1e1d;
}

SCSS

$catch-the-wave: #ade0dd;
$catch-the-wave-rgb: 173, 224, 221;
$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);
}