#33A9BB

CSS

:root {
  --true-sky-blue: #33a9bb;
  --true-sky-blue-rgb: 51 169 187;
  --true-sky-blue-oklch: oklch(0.679 0.104 209.9);
}

.element {
  color: var(--true-sky-blue);
  background-color: hsl(188 57% 47%);
  border-color: oklch(0.679 0.104 209.9);
}

Tailwind CSS v4

@theme {
  --color-true-sky-blue: #33a9bb;
  --color-true-sky-blue-50: #d4feff;
  --color-true-sky-blue-100: #c1f2fc;
  --color-true-sky-blue-200: #a0e1ee;
  --color-true-sky-blue-300: #74c6d6;
  --color-true-sky-blue-400: #45afc0;
  --color-true-sky-blue-500: #0098ac;
  --color-true-sky-blue-600: #008191;
  --color-true-sky-blue-700: #006774;
  --color-true-sky-blue-800: #004c55;
  --color-true-sky-blue-900: #00353b;
  --color-true-sky-blue-950: #002025;
}

SCSS

$true-sky-blue: #33a9bb;
$true-sky-blue-rgb: 51, 169, 187;
$true-sky-blue-light: mix(#fff, $true-sky-blue, 20%);
$true-sky-blue-dark: mix(#000, $true-sky-blue, 20%);

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