#94D1F2

CSS

:root {
  --below-zero: #94d1f2;
  --below-zero-rgb: 148 209 242;
  --below-zero-oklch: oklch(0.831 0.078 232.6);
}

.element {
  color: var(--below-zero);
  background-color: hsl(201 78% 76%);
  border-color: oklch(0.831 0.078 232.6);
}

Tailwind CSS v4

@theme {
  --color-below-zero: #94d1f2;
  --color-below-zero-50: #e1f9ff;
  --color-below-zero-100: #d0edfe;
  --color-below-zero-200: #b5daf1;
  --color-below-zero-300: #91bfda;
  --color-below-zero-400: #6ea7c5;
  --color-below-zero-500: #4c8fb1;
  --color-below-zero-600: #417996;
  --color-below-zero-700: #346178;
  --color-below-zero-800: #234758;
  --color-below-zero-900: #18313e;
  --color-below-zero-950: #081d27;
}

SCSS

$below-zero: #94d1f2;
$below-zero-rgb: 148, 209, 242;
$below-zero-light: mix(#fff, $below-zero, 20%);
$below-zero-dark: mix(#000, $below-zero, 20%);

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