#4CA7BB

CSS

:root {
  --true-sky-blue: #4ca7bb;
  --true-sky-blue-rgb: 76 167 187;
  --true-sky-blue-oklch: oklch(0.681 0.091 214.3);
}

.element {
  color: var(--true-sky-blue);
  background-color: hsl(191 45% 52%);
  border-color: oklch(0.681 0.091 214.3);
}

Tailwind CSS v4

@theme {
  --color-true-sky-blue: #4ca7bb;
  --color-true-sky-blue-50: #d9fcff;
  --color-true-sky-blue-100: #c7f0fc;
  --color-true-sky-blue-200: #a9dfed;
  --color-true-sky-blue-300: #80c3d5;
  --color-true-sky-blue-400: #58acbf;
  --color-true-sky-blue-500: #2695ab;
  --color-true-sky-blue-600: #237e90;
  --color-true-sky-blue-700: #1c6574;
  --color-true-sky-blue-800: #114a55;
  --color-true-sky-blue-900: #0b343b;
  --color-true-sky-blue-950: #001f25;
}

SCSS

$true-sky-blue: #4ca7bb;
$true-sky-blue-rgb: 76, 167, 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);
}