Dark Navy

CSS

:root {
  --dark-navy: #40495b;
  --dark-navy-rgb: 64 73 91;
  --dark-navy-oklch: oklch(0.405 0.033 264.1);
}

.element {
  color: var(--dark-navy);
  background-color: hsl(220 17% 30%);
  border-color: oklch(0.405 0.033 264.1);
}

Tailwind CSS v4

@theme {
  --color-dark-navy: #40495b;
  --color-dark-navy-50: #f1f5ff;
  --color-dark-navy-100: #e3e8f3;
  --color-dark-navy-200: #ced4e3;
  --color-dark-navy-300: #b0b7c9;
  --color-dark-navy-400: #959fb2;
  --color-dark-navy-500: #7b869c;
  --color-dark-navy-600: #687284;
  --color-dark-navy-700: #535b6a;
  --color-dark-navy-800: #3c434e;
  --color-dark-navy-900: #292e36;
  --color-dark-navy-950: #171b21;
}

SCSS

$dark-navy: #40495b;
$dark-navy-rgb: 64, 73, 91;
$dark-navy-light: mix(#fff, $dark-navy, 20%);
$dark-navy-dark: mix(#000, $dark-navy, 20%);

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