#5EA2C9

CSS

:root {
  --sub-zero: #5ea2c9;
  --sub-zero-rgb: 94 162 201;
  --sub-zero-oklch: oklch(0.683 0.09 235.3);
}

.element {
  color: var(--sub-zero);
  background-color: hsl(202 50% 58%);
  border-color: oklch(0.683 0.09 235.3);
}

Tailwind CSS v4

@theme {
  --color-sub-zero: #5ea2c9;
  --color-sub-zero-50: #defaff;
  --color-sub-zero-100: #cdedff;
  --color-sub-zero-200: #b1dbf7;
  --color-sub-zero-300: #8bbfe0;
  --color-sub-zero-400: #67a7cc;
  --color-sub-zero-500: #428fb9;
  --color-sub-zero-600: #39799c;
  --color-sub-zero-700: #2d617e;
  --color-sub-zero-800: #1e475d;
  --color-sub-zero-900: #143241;
  --color-sub-zero-950: #051d29;
}

SCSS

$sub-zero: #5ea2c9;
$sub-zero-rgb: 94, 162, 201;
$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);
}