#0099BB

CSS

:root {
  --blue-ocean: #0099bb;
  --blue-ocean-rgb: 0 153 187;
  --blue-ocean-oklch: oklch(0.632 0.116 221);
}

.element {
  color: var(--blue-ocean);
  background-color: hsl(191 100% 37%);
  border-color: oklch(0.632 0.116 221);
}

Tailwind CSS v4

@theme {
  --color-blue-ocean: #0099bb;
  --color-blue-ocean-50: #d2fdff;
  --color-blue-ocean-100: #bef1ff;
  --color-blue-ocean-200: #9de0f9;
  --color-blue-ocean-300: #70c5e3;
  --color-blue-ocean-400: #3caece;
  --color-blue-ocean-500: #0096bc;
  --color-blue-ocean-600: #007f9f;
  --color-blue-ocean-700: #00667f;
  --color-blue-ocean-800: #004b5d;
  --color-blue-ocean-900: #003441;
  --color-blue-ocean-950: #001f2a;
}

SCSS

$blue-ocean: #0099bb;
$blue-ocean-rgb: 0, 153, 187;
$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);
}