#3D7572

CSS

:root {
  --tropical-rain: #3d7572;
  --tropical-rain-rgb: 61 117 114;
  --tropical-rain-oklch: oklch(0.523 0.059 191);
}

.element {
  color: var(--tropical-rain);
  background-color: hsl(177 31% 35%);
  border-color: oklch(0.523 0.059 191);
}

Tailwind CSS v4

@theme {
  --color-tropical-rain: #3d7572;
  --color-tropical-rain-50: #e3fbfa;
  --color-tropical-rain-100: #d2efed;
  --color-tropical-rain-200: #b8dddb;
  --color-tropical-rain-300: #95c2c0;
  --color-tropical-rain-400: #75aaa7;
  --color-tropical-rain-500: #54938f;
  --color-tropical-rain-600: #487c79;
  --color-tropical-rain-700: #396461;
  --color-tropical-rain-800: #294946;
  --color-tropical-rain-900: #1b3331;
  --color-tropical-rain-950: #0b1e1d;
}

SCSS

$tropical-rain: #3d7572;
$tropical-rain-rgb: 61, 117, 114;
$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);
}