Placebo Blue

CSS

:root {
  --placebo-blue: #ebf4fc;
  --placebo-blue-rgb: 235 244 252;
  --placebo-blue-oklch: oklch(0.963 0.014 244.7);
}

.element {
  color: var(--placebo-blue);
  background-color: hsl(208 74% 95%);
  border-color: oklch(0.963 0.014 244.7);
}

Tailwind CSS v4

@theme {
  --color-placebo-blue: #ebf4fc;
  --color-placebo-blue-50: #f2f6f9;
  --color-placebo-blue-100: #e4e8ec;
  --color-placebo-blue-200: #cfd5da;
  --color-placebo-blue-300: #b2b8be;
  --color-placebo-blue-400: #98a0a7;
  --color-placebo-blue-500: #7f878f;
  --color-placebo-blue-600: #6b7379;
  --color-placebo-blue-700: #565c61;
  --color-placebo-blue-800: #3e4347;
  --color-placebo-blue-900: #2b2e31;
  --color-placebo-blue-950: #181b1d;
}

SCSS

$placebo-blue: #ebf4fc;
$placebo-blue-rgb: 235, 244, 252;
$placebo-blue-light: mix(#fff, $placebo-blue, 20%);
$placebo-blue-dark: mix(#000, $placebo-blue, 20%);

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