#0099C5

CSS

:root {
  --blue-ocean: #0099c5;
  --blue-ocean-rgb: 0 153 197;
  --blue-ocean-oklch: oklch(0.637 0.123 227.2);
}

.element {
  color: var(--blue-ocean);
  background-color: hsl(193 100% 39%);
  border-color: oklch(0.637 0.123 227.2);
}

Tailwind CSS v4

@theme {
  --color-blue-ocean: #0099c5;
  --color-blue-ocean-50: #d2fdff;
  --color-blue-ocean-100: #bef1ff;
  --color-blue-ocean-200: #9cdfff;
  --color-blue-ocean-300: #6fc4ea;
  --color-blue-ocean-400: #3aacd7;
  --color-blue-ocean-500: #0095c5;
  --color-blue-ocean-600: #007ea6;
  --color-blue-ocean-700: #006585;
  --color-blue-ocean-800: #004a62;
  --color-blue-ocean-900: #003445;
  --color-blue-ocean-950: #001f2d;
}

SCSS

$blue-ocean: #0099c5;
$blue-ocean-rgb: 0, 153, 197;
$blue-ocean-light: mix(#fff, $blue-ocean, 20%);
$blue-ocean-dark: mix(#000, $blue-ocean, 20%);

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