#7FBCA0

CSS

:root {
  --neptune-green: #7fbca0;
  --neptune-green-rgb: 127 188 160;
  --neptune-green-oklch: oklch(0.746 0.075 164.2);
}

.element {
  color: var(--neptune-green);
  background-color: hsl(152 31% 62%);
  border-color: oklch(0.746 0.075 164.2);
}

Tailwind CSS v4

@theme {
  --color-neptune-green: #7fbca0;
  --color-neptune-green-50: #e2fcf0;
  --color-neptune-green-100: #d1f0e2;
  --color-neptune-green-200: #b7dfcd;
  --color-neptune-green-300: #93c4af;
  --color-neptune-green-400: #74ad93;
  --color-neptune-green-500: #539679;
  --color-neptune-green-600: #477f66;
  --color-neptune-green-700: #386652;
  --color-neptune-green-800: #294b3a;
  --color-neptune-green-900: #1b3428;
  --color-neptune-green-950: #0b1f16;
}

SCSS

$neptune-green: #7fbca0;
$neptune-green-rgb: 127, 188, 160;
$neptune-green-light: mix(#fff, $neptune-green, 20%);
$neptune-green-dark: mix(#000, $neptune-green, 20%);

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