Saltbox Blue

CSS

:root {
  --saltbox-blue: #648fa4;
  --saltbox-blue-rgb: 100 143 164;
  --saltbox-blue-oklch: oklch(0.627 0.057 229.9);
}

.element {
  color: var(--saltbox-blue);
  background-color: hsl(200 26% 52%);
  border-color: oklch(0.627 0.057 229.9);
}

Tailwind CSS v4

@theme {
  --color-saltbox-blue: #648fa4;
  --color-saltbox-blue-50: #e6f9ff;
  --color-saltbox-blue-100: #d6ecf8;
  --color-saltbox-blue-200: #bdd9e9;
  --color-saltbox-blue-300: #9bbdd0;
  --color-saltbox-blue-400: #7ca5ba;
  --color-saltbox-blue-500: #5e8ea5;
  --color-saltbox-blue-600: #50788b;
  --color-saltbox-blue-700: #406070;
  --color-saltbox-blue-800: #2d4652;
  --color-saltbox-blue-900: #1e3139;
  --color-saltbox-blue-950: #0e1d23;
}

SCSS

$saltbox-blue: #648fa4;
$saltbox-blue-rgb: 100, 143, 164;
$saltbox-blue-light: mix(#fff, $saltbox-blue, 20%);
$saltbox-blue-dark: mix(#000, $saltbox-blue, 20%);

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