#007694

CSS

:root {
  --celestial: #007694;
  --celestial-rgb: 0 118 148;
  --celestial-oklch: oklch(0.525 0.098 223.6);
}

.element {
  color: var(--celestial);
  background-color: hsl(192 100% 29%);
  border-color: oklch(0.525 0.098 223.6);
}

Tailwind CSS v4

@theme {
  --color-celestial: #007694;
  --color-celestial-50: #d8fcff;
  --color-celestial-100: #c6f0ff;
  --color-celestial-200: #a7def4;
  --color-celestial-300: #7fc2de;
  --color-celestial-400: #55abc9;
  --color-celestial-500: #2094b6;
  --color-celestial-600: #1f7d9a;
  --color-celestial-700: #19647b;
  --color-celestial-800: #0e4a5a;
  --color-celestial-900: #09333f;
  --color-celestial-950: #001f28;
}

SCSS

$celestial: #007694;
$celestial-rgb: 0, 118, 148;
$celestial-light: mix(#fff, $celestial, 20%);
$celestial-dark: mix(#000, $celestial, 20%);

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