#51A8A8

CSS

:root {
  --twilight-meadow: #51a8a8;
  --twilight-meadow-rgb: 81 168 168;
  --twilight-meadow-oklch: oklch(0.678 0.084 195.4);
}

.element {
  color: var(--twilight-meadow);
  background-color: hsl(180 35% 49%);
  border-color: oklch(0.678 0.084 195.4);
}

Tailwind CSS v4

@theme {
  --color-twilight-meadow: #51a8a8;
  --color-twilight-meadow-50: #dbfdfd;
  --color-twilight-meadow-100: #c9f1f2;
  --color-twilight-meadow-200: #abe0e1;
  --color-twilight-meadow-300: #83c5c6;
  --color-twilight-meadow-400: #5daeae;
  --color-twilight-meadow-500: #309798;
  --color-twilight-meadow-600: #2b8080;
  --color-twilight-meadow-700: #226667;
  --color-twilight-meadow-800: #174b4a;
  --color-twilight-meadow-900: #0f3434;
  --color-twilight-meadow-950: #02201f;
}

SCSS

$twilight-meadow: #51a8a8;
$twilight-meadow-rgb: 81, 168, 168;
$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);
}