#459D9F

CSS

:root {
  --baltic: #459d9f;
  --baltic-rgb: 69 157 159;
  --baltic-oklch: oklch(0.644 0.084 197.3);
}

.element {
  color: var(--baltic);
  background-color: hsl(181 39% 45%);
  border-color: oklch(0.644 0.084 197.3);
}

Tailwind CSS v4

@theme {
  --color-baltic: #459d9f;
  --color-baltic-50: #dbfdfe;
  --color-baltic-100: #c8f1f3;
  --color-baltic-200: #abe0e2;
  --color-baltic-300: #83c5c8;
  --color-baltic-400: #5daeb0;
  --color-baltic-500: #2f9799;
  --color-baltic-600: #2a8082;
  --color-baltic-700: #226668;
  --color-baltic-800: #164b4b;
  --color-baltic-900: #0f3434;
  --color-baltic-950: #022020;
}

SCSS

$baltic: #459d9f;
$baltic-rgb: 69, 157, 159;
$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);
}