Sixties Blue

CSS

:root {
  --sixties-blue: #0079a9;
  --sixties-blue-rgb: 0 121 169;
  --sixties-blue-oklch: oklch(0.544 0.116 235.1);
}

.element {
  color: var(--sixties-blue);
  background-color: hsl(197 100% 33%);
  border-color: oklch(0.544 0.116 235.1);
}

Tailwind CSS v4

@theme {
  --color-sixties-blue: #0079a9;
  --color-sixties-blue-50: #d7fbff;
  --color-sixties-blue-100: #c4efff;
  --color-sixties-blue-200: #a5dcff;
  --color-sixties-blue-300: #7cc1eb;
  --color-sixties-blue-400: #51a9d9;
  --color-sixties-blue-500: #1591c7;
  --color-sixties-blue-600: #187ba8;
  --color-sixties-blue-700: #146287;
  --color-sixties-blue-800: #074864;
  --color-sixties-blue-900: #053246;
  --color-sixties-blue-950: #001e2d;
}

SCSS

$sixties-blue: #0079a9;
$sixties-blue-rgb: 0, 121, 169;
$sixties-blue-light: mix(#fff, $sixties-blue, 20%);
$sixties-blue-dark: mix(#000, $sixties-blue, 20%);

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