#49A3D6

CSS

:root {
  --sub-zero: #49a3d6;
  --sub-zero-rgb: 73 163 214;
  --sub-zero-oklch: oklch(0.682 0.114 236.7);
}

.element {
  color: var(--sub-zero);
  background-color: hsl(202 63% 56%);
  border-color: oklch(0.682 0.114 236.7);
}

Tailwind CSS v4

@theme {
  --color-sub-zero: #49a3d6;
  --color-sub-zero-50: #d8fbff;
  --color-sub-zero-100: #c6eeff;
  --color-sub-zero-200: #a7dcff;
  --color-sub-zero-300: #7fc0eb;
  --color-sub-zero-400: #55a8d9;
  --color-sub-zero-500: #2190c7;
  --color-sub-zero-600: #207aa8;
  --color-sub-zero-700: #196287;
  --color-sub-zero-800: #0c4864;
  --color-sub-zero-900: #083246;
  --color-sub-zero-950: #001e2e;
}

SCSS

$sub-zero: #49a3d6;
$sub-zero-rgb: 73, 163, 214;
$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);
}