Blue Emerald

CSS

:root {
  --blue-emerald: #0f5a5e;
  --blue-emerald-rgb: 15 90 94;
  --blue-emerald-oklch: oklch(0.427 0.068 200.5);
}

.element {
  color: var(--blue-emerald);
  background-color: hsl(183 72% 21%);
  border-color: oklch(0.427 0.068 200.5);
}

Tailwind CSS v4

@theme {
  --color-blue-emerald: #0f5a5e;
  --color-blue-emerald-50: #e0fbfe;
  --color-blue-emerald-100: #cfeff2;
  --color-blue-emerald-200: #b3dde1;
  --color-blue-emerald-300: #8ec2c6;
  --color-blue-emerald-400: #6cabaf;
  --color-blue-emerald-500: #499498;
  --color-blue-emerald-600: #3f7d81;
  --color-blue-emerald-700: #326467;
  --color-blue-emerald-800: #234a4b;
  --color-blue-emerald-900: #173334;
  --color-blue-emerald-950: #081f20;
}

SCSS

$blue-emerald: #0f5a5e;
$blue-emerald-rgb: 15, 90, 94;
$blue-emerald-light: mix(#fff, $blue-emerald, 20%);
$blue-emerald-dark: mix(#000, $blue-emerald, 20%);

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