Utterly Blue

CSS

:root {
  --utterly-blue: #a8c6de;
  --utterly-blue-rgb: 168 198 222;
  --utterly-blue-oklch: oklch(0.812 0.047 242.4);
}

.element {
  color: var(--utterly-blue);
  background-color: hsl(207 45% 76%);
  border-color: oklch(0.812 0.047 242.4);
}

Tailwind CSS v4

@theme {
  --color-utterly-blue: #a8c6de;
  --color-utterly-blue-50: #eaf7ff;
  --color-utterly-blue-100: #dbeaf7;
  --color-utterly-blue-200: #c4d7e7;
  --color-utterly-blue-300: #a4bbce;
  --color-utterly-blue-400: #87a2b8;
  --color-utterly-blue-500: #6b8aa3;
  --color-utterly-blue-600: #5b758a;
  --color-utterly-blue-700: #485e6e;
  --color-utterly-blue-800: #344551;
  --color-utterly-blue-900: #233039;
  --color-utterly-blue-950: #121c23;
}

SCSS

$utterly-blue: #a8c6de;
$utterly-blue-rgb: 168, 198, 222;
$utterly-blue-light: mix(#fff, $utterly-blue, 20%);
$utterly-blue-dark: mix(#000, $utterly-blue, 20%);

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