#009AA0

CSS

:root {
  --baltic: #009aa0;
  --baltic-rgb: 0 154 160;
  --baltic-oklch: oklch(0.624 0.106 199.7);
}

.element {
  color: var(--baltic);
  background-color: hsl(182 100% 31%);
  border-color: oklch(0.624 0.106 199.7);
}

Tailwind CSS v4

@theme {
  --color-baltic: #009aa0;
  --color-baltic-50: #d3ffff;
  --color-baltic-100: #bff3f7;
  --color-baltic-200: #9ee2e7;
  --color-baltic-300: #70c8ce;
  --color-baltic-400: #3fb1b7;
  --color-baltic-500: #009aa1;
  --color-baltic-600: #008388;
  --color-baltic-700: #00696d;
  --color-baltic-800: #004d4f;
  --color-baltic-900: #003637;
  --color-baltic-950: #002122;
}

SCSS

$baltic: #009aa0;
$baltic-rgb: 0, 154, 160;
$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);
}