#56A3CA

CSS

:root {
  --sub-zero: #56a3ca;
  --sub-zero-rgb: 86 163 202;
  --sub-zero-oklch: oklch(0.682 0.095 232.6);
}

.element {
  color: var(--sub-zero);
  background-color: hsl(200 52% 56%);
  border-color: oklch(0.682 0.095 232.6);
}

Tailwind CSS v4

@theme {
  --color-sub-zero: #56a3ca;
  --color-sub-zero-50: #dcfaff;
  --color-sub-zero-100: #caeeff;
  --color-sub-zero-200: #addcf8;
  --color-sub-zero-300: #86c0e1;
  --color-sub-zero-400: #60a8ce;
  --color-sub-zero-500: #3790bb;
  --color-sub-zero-600: #307a9e;
  --color-sub-zero-700: #26627e;
  --color-sub-zero-800: #18485d;
  --color-sub-zero-900: #103241;
  --color-sub-zero-950: #031e2a;
}

SCSS

$sub-zero: #56a3ca;
$sub-zero-rgb: 86, 163, 202;
$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);
}