#4CA3D7

CSS

:root {
  --sub-zero: #4ca3d7;
  --sub-zero-rgb: 76 163 215;
  --sub-zero-oklch: oklch(0.684 0.113 237.9);
}

.element {
  color: var(--sub-zero);
  background-color: hsl(202 63% 57%);
  border-color: oklch(0.684 0.113 237.9);
}

Tailwind CSS v4

@theme {
  --color-sub-zero: #4ca3d7;
  --color-sub-zero-50: #d9faff;
  --color-sub-zero-100: #c7eeff;
  --color-sub-zero-200: #a8dcff;
  --color-sub-zero-300: #80c0ec;
  --color-sub-zero-400: #57a8d9;
  --color-sub-zero-500: #2690c8;
  --color-sub-zero-600: #237aa9;
  --color-sub-zero-700: #1c6187;
  --color-sub-zero-800: #0f4864;
  --color-sub-zero-900: #0a3246;
  --color-sub-zero-950: #001d2e;
}

SCSS

$sub-zero: #4ca3d7;
$sub-zero-rgb: 76, 163, 215;
$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);
}