Blue Yonder

CSS

:root {
  --blue-yonder: #5a77a8;
  --blue-yonder-rgb: 90 119 168;
  --blue-yonder-oklch: oklch(0.567 0.084 260.6);
}

.element {
  color: var(--blue-yonder);
  background-color: hsl(218 31% 51%);
  border-color: oklch(0.567 0.084 260.6);
}

Tailwind CSS v4

@theme {
  --color-blue-yonder: #5a77a8;
  --color-blue-yonder-50: #e9f6ff;
  --color-blue-yonder-100: #d9e9ff;
  --color-blue-yonder-200: #c1d5f9;
  --color-blue-yonder-300: #a1b8e3;
  --color-blue-yonder-400: #829fd0;
  --color-blue-yonder-500: #6687be;
  --color-blue-yonder-600: #5772a0;
  --color-blue-yonder-700: #455b81;
  --color-blue-yonder-800: #30435f;
  --color-blue-yonder-900: #212e43;
  --color-blue-yonder-950: #101b2b;
}

SCSS

$blue-yonder: #5a77a8;
$blue-yonder-rgb: 90, 119, 168;
$blue-yonder-light: mix(#fff, $blue-yonder, 20%);
$blue-yonder-dark: mix(#000, $blue-yonder, 20%);

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