#00C7DF

CSS

:root {
  --caribbean-blue: #00c7df;
  --caribbean-blue-rgb: 0 199 223;
  --caribbean-blue-oklch: oklch(0.76 0.131 210);
}

.element {
  color: var(--caribbean-blue);
  background-color: hsl(186 100% 44%);
  border-color: oklch(0.76 0.131 210);
}

Tailwind CSS v4

@theme {
  --color-caribbean-blue: #00c7df;
  --color-caribbean-blue-50: #cbffff;
  --color-caribbean-blue-100: #b5f4ff;
  --color-caribbean-blue-200: #8fe4f5;
  --color-caribbean-blue-300: #59c9de;
  --color-caribbean-blue-400: #00b3c9;
  --color-caribbean-blue-500: #009cb6;
  --color-caribbean-blue-600: #008499;
  --color-caribbean-blue-700: #006a7b;
  --color-caribbean-blue-800: #004e5a;
  --color-caribbean-blue-900: #00363f;
  --color-caribbean-blue-950: #002128;
}

SCSS

$caribbean-blue: #00c7df;
$caribbean-blue-rgb: 0, 199, 223;
$caribbean-blue-light: mix(#fff, $caribbean-blue, 20%);
$caribbean-blue-dark: mix(#000, $caribbean-blue, 20%);

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