#58A3CE

CSS

:root {
  --sub-zero: #58a3ce;
  --sub-zero-rgb: 88 163 206;
  --sub-zero-oklch: oklch(0.684 0.098 235.8);
}

.element {
  color: var(--sub-zero);
  background-color: hsl(202 55% 58%);
  border-color: oklch(0.684 0.098 235.8);
}

Tailwind CSS v4

@theme {
  --color-sub-zero: #58a3ce;
  --color-sub-zero-50: #dcfaff;
  --color-sub-zero-100: #caedff;
  --color-sub-zero-200: #aedbfa;
  --color-sub-zero-300: #87bfe4;
  --color-sub-zero-400: #61a8d1;
  --color-sub-zero-500: #3990be;
  --color-sub-zero-600: #327aa0;
  --color-sub-zero-700: #286181;
  --color-sub-zero-800: #19485f;
  --color-sub-zero-900: #103243;
  --color-sub-zero-950: #031d2b;
}

SCSS

$sub-zero: #58a3ce;
$sub-zero-rgb: 88, 163, 206;
$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);
}