#5BA7A9

CSS

:root {
  --twilight-meadow: #5ba7a9;
  --twilight-meadow-rgb: 91 167 169;
  --twilight-meadow-oklch: oklch(0.68 0.076 197.8);
}

.element {
  color: var(--twilight-meadow);
  background-color: hsl(182 31% 51%);
  border-color: oklch(0.68 0.076 197.8);
}

Tailwind CSS v4

@theme {
  --color-twilight-meadow: #5ba7a9;
  --color-twilight-meadow-50: #ddfcfe;
  --color-twilight-meadow-100: #ccf0f2;
  --color-twilight-meadow-200: #afdfe1;
  --color-twilight-meadow-300: #89c4c6;
  --color-twilight-meadow-400: #65acae;
  --color-twilight-meadow-500: #3e9698;
  --color-twilight-meadow-600: #367e80;
  --color-twilight-meadow-700: #2b6567;
  --color-twilight-meadow-800: #1d4b4b;
  --color-twilight-meadow-900: #133434;
  --color-twilight-meadow-950: #051f1f;
}

SCSS

$twilight-meadow: #5ba7a9;
$twilight-meadow-rgb: 91, 167, 169;
$twilight-meadow-light: mix(#fff, $twilight-meadow, 20%);
$twilight-meadow-dark: mix(#000, $twilight-meadow, 20%);

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