Fountain Blue

CSS

:root {
  --fountain-blue: #65adb2;
  --fountain-blue-rgb: 101 173 178;
  --fountain-blue-oklch: oklch(0.702 0.073 201.4);
}

.element {
  color: var(--fountain-blue);
  background-color: hsl(184 33% 55%);
  border-color: oklch(0.702 0.073 201.4);
}

Tailwind CSS v4

@theme {
  --color-fountain-blue: #65adb2;
  --color-fountain-blue-50: #defcfe;
  --color-fountain-blue-100: #cdf0f3;
  --color-fountain-blue-200: #b1dee2;
  --color-fountain-blue-300: #8bc3c8;
  --color-fountain-blue-400: #68acb0;
  --color-fountain-blue-500: #42959a;
  --color-fountain-blue-600: #397e82;
  --color-fountain-blue-700: #2e6568;
  --color-fountain-blue-800: #1f4a4c;
  --color-fountain-blue-900: #153335;
  --color-fountain-blue-950: #061f20;
}

SCSS

$fountain-blue: #65adb2;
$fountain-blue-rgb: 101, 173, 178;
$fountain-blue-light: mix(#fff, $fountain-blue, 20%);
$fountain-blue-dark: mix(#000, $fountain-blue, 20%);

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