#58A3CC

CSS

:root {
  --sub-zero: #58a3cc;
  --sub-zero-rgb: 88 163 204;
  --sub-zero-oklch: oklch(0.684 0.096 234.5);
}

.element {
  color: var(--sub-zero);
  background-color: hsl(201 53% 57%);
  border-color: oklch(0.684 0.096 234.5);
}

Tailwind CSS v4

@theme {
  --color-sub-zero: #58a3cc;
  --color-sub-zero-50: #dcfaff;
  --color-sub-zero-100: #cbeeff;
  --color-sub-zero-200: #aedbf8;
  --color-sub-zero-300: #87bfe3;
  --color-sub-zero-400: #61a8cf;
  --color-sub-zero-500: #3990bc;
  --color-sub-zero-600: #327a9f;
  --color-sub-zero-700: #286280;
  --color-sub-zero-800: #19485e;
  --color-sub-zero-900: #113242;
  --color-sub-zero-950: #031e2a;
}

SCSS

$sub-zero: #58a3cc;
$sub-zero-rgb: 88, 163, 204;
$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);
}