Sub-Zero

CSS

:root {
  --sub-zero: #57a1ce;
  --sub-zero-rgb: 87 161 206;
  --sub-zero-oklch: oklch(0.679 0.1 237.4);
}

.element {
  color: var(--sub-zero);
  background-color: hsl(203 55% 57%);
  border-color: oklch(0.679 0.1 237.4);
}

Tailwind CSS v4

@theme {
  --color-sub-zero: #57a1ce;
  --color-sub-zero-50: #dcfaff;
  --color-sub-zero-100: #cbedff;
  --color-sub-zero-200: #aedbfb;
  --color-sub-zero-300: #88bfe5;
  --color-sub-zero-400: #62a7d2;
  --color-sub-zero-500: #3a8fc0;
  --color-sub-zero-600: #3279a2;
  --color-sub-zero-700: #286182;
  --color-sub-zero-800: #194760;
  --color-sub-zero-900: #113243;
  --color-sub-zero-950: #031d2b;
}

SCSS

$sub-zero: #57a1ce;
$sub-zero-rgb: 87, 161, 206;
$sub-zero-light: mix(#fff, $sub-zero, 20%);
$sub-zero-dark: mix(#000, $sub-zero, 20%);

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