#5EA2CF

CSS

:root {
  --sub-zero: #5ea2cf;
  --sub-zero-rgb: 94 162 207;
  --sub-zero-oklch: oklch(0.685 0.096 239.3);
}

.element {
  color: var(--sub-zero);
  background-color: hsl(204 54% 59%);
  border-color: oklch(0.685 0.096 239.3);
}

Tailwind CSS v4

@theme {
  --color-sub-zero: #5ea2cf;
  --color-sub-zero-50: #def9ff;
  --color-sub-zero-100: #ccedff;
  --color-sub-zero-200: #b0dafa;
  --color-sub-zero-300: #8bbee4;
  --color-sub-zero-400: #66a6d1;
  --color-sub-zero-500: #418ebf;
  --color-sub-zero-600: #3878a1;
  --color-sub-zero-700: #2d6081;
  --color-sub-zero-800: #1d475f;
  --color-sub-zero-900: #133143;
  --color-sub-zero-950: #051d2b;
}

SCSS

$sub-zero: #5ea2cf;
$sub-zero-rgb: 94, 162, 207;
$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);
}