Below Zero

CSS

:root {
  --below-zero: #87cded;
  --below-zero-rgb: 135 205 237;
  --below-zero-oklch: oklch(0.813 0.083 228.6);
}

.element {
  color: var(--below-zero);
  background-color: hsl(199 74% 73%);
  border-color: oklch(0.813 0.083 228.6);
}

Tailwind CSS v4

@theme {
  --color-below-zero: #87cded;
  --color-below-zero-50: #defaff;
  --color-below-zero-100: #cdeeff;
  --color-below-zero-200: #b1dcf2;
  --color-below-zero-300: #8bc0da;
  --color-below-zero-400: #67a8c6;
  --color-below-zero-500: #4291b2;
  --color-below-zero-600: #397a96;
  --color-below-zero-700: #2d6279;
  --color-below-zero-800: #1e4859;
  --color-below-zero-900: #14323e;
  --color-below-zero-950: #051e27;
}

SCSS

$below-zero: #87cded;
$below-zero-rgb: 135, 205, 237;
$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);
}