#437571

CSS

:root {
  --tropical-rain: #437571;
  --tropical-rain-rgb: 67 117 113;
  --tropical-rain-oklch: oklch(0.526 0.055 189.1);
}

.element {
  color: var(--tropical-rain);
  background-color: hsl(175 27% 36%);
  border-color: oklch(0.526 0.055 189.1);
}

Tailwind CSS v4

@theme {
  --color-tropical-rain: #437571;
  --color-tropical-rain-50: #e4fbf9;
  --color-tropical-rain-100: #d4eeec;
  --color-tropical-rain-200: #bbdcda;
  --color-tropical-rain-300: #98c1be;
  --color-tropical-rain-400: #79a9a5;
  --color-tropical-rain-500: #5a928d;
  --color-tropical-rain-600: #4c7c78;
  --color-tropical-rain-700: #3d6360;
  --color-tropical-rain-800: #2c4945;
  --color-tropical-rain-900: #1d3230;
  --color-tropical-rain-950: #0d1e1c;
}

SCSS

$tropical-rain: #437571;
$tropical-rain-rgb: 67, 117, 113;
$tropical-rain-light: mix(#fff, $tropical-rain, 20%);
$tropical-rain-dark: mix(#000, $tropical-rain, 20%);

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