Srsly Blue

CSS

:root {
  --srsly-blue: #addae3;
  --srsly-blue-rgb: 173 218 227;
  --srsly-blue-oklch: oklch(0.86 0.048 211.2);
}

.element {
  color: var(--srsly-blue);
  background-color: hsl(190 49% 78%);
  border-color: oklch(0.86 0.048 211.2);
}

Tailwind CSS v4

@theme {
  --color-srsly-blue: #addae3;
  --color-srsly-blue-50: #e6f9fd;
  --color-srsly-blue-100: #d7edf2;
  --color-srsly-blue-200: #bedae1;
  --color-srsly-blue-300: #9cbec6;
  --color-srsly-blue-400: #7da7af;
  --color-srsly-blue-500: #608f99;
  --color-srsly-blue-600: #517981;
  --color-srsly-blue-700: #416167;
  --color-srsly-blue-800: #2e474b;
  --color-srsly-blue-900: #1f3134;
  --color-srsly-blue-950: #0f1d20;
}

SCSS

$srsly-blue: #addae3;
$srsly-blue-rgb: 173, 218, 227;
$srsly-blue-light: mix(#fff, $srsly-blue, 20%);
$srsly-blue-dark: mix(#000, $srsly-blue, 20%);

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