#48A7BD

CSS

:root {
  --true-sky-blue: #48a7bd;
  --true-sky-blue-rgb: 72 167 189;
  --true-sky-blue-oklch: oklch(0.68 0.094 215.5);
}

.element {
  color: var(--true-sky-blue);
  background-color: hsl(191 47% 51%);
  border-color: oklch(0.68 0.094 215.5);
}

Tailwind CSS v4

@theme {
  --color-true-sky-blue: #48a7bd;
  --color-true-sky-blue-50: #d8fcff;
  --color-true-sky-blue-100: #c6f0fd;
  --color-true-sky-blue-200: #a7dfef;
  --color-true-sky-blue-300: #7ec4d7;
  --color-true-sky-blue-400: #55adc1;
  --color-true-sky-blue-500: #1e95ad;
  --color-true-sky-blue-600: #1e7e92;
  --color-true-sky-blue-700: #186575;
  --color-true-sky-blue-800: #0e4b56;
  --color-true-sky-blue-900: #09343c;
  --color-true-sky-blue-950: #001f26;
}

SCSS

$true-sky-blue: #48a7bd;
$true-sky-blue-rgb: 72, 167, 189;
$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);
}