#49A7B9

CSS

:root {
  --true-sky-blue: #49a7b9;
  --true-sky-blue-rgb: 73 167 185;
  --true-sky-blue-oklch: oklch(0.679 0.092 212.2);
}

.element {
  color: var(--true-sky-blue);
  background-color: hsl(190 44% 51%);
  border-color: oklch(0.679 0.092 212.2);
}

Tailwind CSS v4

@theme {
  --color-true-sky-blue: #49a7b9;
  --color-true-sky-blue-50: #d9fdff;
  --color-true-sky-blue-100: #c6f0fb;
  --color-true-sky-blue-200: #a8dfec;
  --color-true-sky-blue-300: #7fc4d4;
  --color-true-sky-blue-400: #56adbe;
  --color-true-sky-blue-500: #2196a9;
  --color-true-sky-blue-600: #207f8f;
  --color-true-sky-blue-700: #1a6573;
  --color-true-sky-blue-800: #0f4b54;
  --color-true-sky-blue-900: #0a343b;
  --color-true-sky-blue-950: #001f25;
}

SCSS

$true-sky-blue: #49a7b9;
$true-sky-blue-rgb: 73, 167, 185;
$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);
}