#009C9E

CSS

:root {
  --baltic: #009c9e;
  --baltic-rgb: 0 156 158;
  --baltic-oklch: oklch(0.628 0.107 196.4);
}

.element {
  color: var(--baltic);
  background-color: hsl(181 100% 31%);
  border-color: oklch(0.628 0.107 196.4);
}

Tailwind CSS v4

@theme {
  --color-baltic: #009c9e;
  --color-baltic-50: #d3ffff;
  --color-baltic-100: #bff3f5;
  --color-baltic-200: #9de3e5;
  --color-baltic-300: #70c8cb;
  --color-baltic-400: #3eb2b3;
  --color-baltic-500: #009b9e;
  --color-baltic-600: #008385;
  --color-baltic-700: #00696b;
  --color-baltic-800: #004e4d;
  --color-baltic-900: #003636;
  --color-baltic-950: #002121;
}

SCSS

$baltic: #009c9e;
$baltic-rgb: 0, 156, 158;
$baltic-light: mix(#fff, $baltic, 20%);
$baltic-dark: mix(#000, $baltic, 20%);

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