#38A8C2

CSS

:root {
  --true-sky-blue: #38a8c2;
  --true-sky-blue-rgb: 56 168 194;
  --true-sky-blue-oklch: oklch(0.68 0.105 216.6);
}

.element {
  color: var(--true-sky-blue);
  background-color: hsl(191 55% 49%);
  border-color: oklch(0.68 0.105 216.6);
}

Tailwind CSS v4

@theme {
  --color-true-sky-blue: #38a8c2;
  --color-true-sky-blue-50: #d5fdff;
  --color-true-sky-blue-100: #c2f1ff;
  --color-true-sky-blue-200: #a1e0f3;
  --color-true-sky-blue-300: #76c5dc;
  --color-true-sky-blue-400: #48aec6;
  --color-true-sky-blue-500: #0096b3;
  --color-true-sky-blue-600: #007f97;
  --color-true-sky-blue-700: #006679;
  --color-true-sky-blue-800: #004b59;
  --color-true-sky-blue-900: #01343e;
  --color-true-sky-blue-950: #001f27;
}

SCSS

$true-sky-blue: #38a8c2;
$true-sky-blue-rgb: 56, 168, 194;
$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);
}