#ABCCC4

CSS

:root {
  --misty-morning: #abccc4;
  --misty-morning-rgb: 171 204 196;
  --misty-morning-oklch: oklch(0.819 0.037 179);
}

.element {
  color: var(--misty-morning);
  background-color: hsl(165 24% 74%);
  border-color: oklch(0.819 0.037 179);
}

Tailwind CSS v4

@theme {
  --color-misty-morning: #abccc4;
  --color-misty-morning-50: #eaf9f6;
  --color-misty-morning-100: #dbece8;
  --color-misty-morning-200: #c4dad5;
  --color-misty-morning-300: #a4beb8;
  --color-misty-morning-400: #88a69f;
  --color-misty-morning-500: #6c8f87;
  --color-misty-morning-600: #5c7972;
  --color-misty-morning-700: #49615b;
  --color-misty-morning-800: #354742;
  --color-misty-morning-900: #24312e;
  --color-misty-morning-950: #131d1a;
}

SCSS

$misty-morning: #abccc4;
$misty-morning-rgb: 171, 204, 196;
$misty-morning-light: mix(#fff, $misty-morning, 20%);
$misty-morning-dark: mix(#000, $misty-morning, 20%);

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