#BACDC8

CSS

:root {
  --coast-to-coast: #bacdc8;
  --coast-to-coast-rgb: 186 205 200;
  --coast-to-coast-oklch: oklch(0.832 0.022 178.2);
}

.element {
  color: var(--coast-to-coast);
  background-color: hsl(164 16% 77%);
  border-color: oklch(0.832 0.022 178.2);
}

Tailwind CSS v4

@theme {
  --color-coast-to-coast: #bacdc8;
  --color-coast-to-coast-50: #eff7f5;
  --color-coast-to-coast-100: #e1eae8;
  --color-coast-to-coast-200: #cbd7d4;
  --color-coast-to-coast-300: #acbbb8;
  --color-coast-to-coast-400: #92a39e;
  --color-coast-to-coast-500: #778b86;
  --color-coast-to-coast-600: #657671;
  --color-coast-to-coast-700: #515e5b;
  --color-coast-to-coast-800: #3b4542;
  --color-coast-to-coast-900: #28302e;
  --color-coast-to-coast-950: #161c1a;
}

SCSS

$coast-to-coast: #bacdc8;
$coast-to-coast-rgb: 186, 205, 200;
$coast-to-coast-light: mix(#fff, $coast-to-coast, 20%);
$coast-to-coast-dark: mix(#000, $coast-to-coast, 20%);

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