#006170

CSS

:root {
  --teal-with-it: #006170;
  --teal-with-it-rgb: 0 97 112;
  --teal-with-it-oklch: oklch(0.452 0.079 212.9);
}

.element {
  color: var(--teal-with-it);
  background-color: hsl(188 100% 22%);
  border-color: oklch(0.452 0.079 212.9);
}

Tailwind CSS v4

@theme {
  --color-teal-with-it: #006170;
  --color-teal-with-it-50: #ddfcff;
  --color-teal-with-it-100: #cbeff8;
  --color-teal-with-it-200: #aedee9;
  --color-teal-with-it-300: #88c2d1;
  --color-teal-with-it-400: #63abba;
  --color-teal-with-it-500: #3b94a5;
  --color-teal-with-it-600: #347d8c;
  --color-teal-with-it-700: #296470;
  --color-teal-with-it-800: #1c4a52;
  --color-teal-with-it-900: #123339;
  --color-teal-with-it-950: #041f23;
}

SCSS

$teal-with-it: #006170;
$teal-with-it-rgb: 0, 97, 112;
$teal-with-it-light: mix(#fff, $teal-with-it, 20%);
$teal-with-it-dark: mix(#000, $teal-with-it, 20%);

.element {
  color: $teal-with-it;
  box-shadow: 0 0 0 2px rgba($teal-with-it, 0.35);
}