#6FC1E1

CSS

:root {
  --sky-fall: #6fc1e1;
  --sky-fall-rgb: 111 193 225;
  --sky-fall-oklch: oklch(0.771 0.092 225.4);
}

.element {
  color: var(--sky-fall);
  background-color: hsl(197 66% 66%);
  border-color: oklch(0.771 0.092 225.4);
}

Tailwind CSS v4

@theme {
  --color-sky-fall: #6fc1e1;
  --color-sky-fall-50: #dbfbff;
  --color-sky-fall-100: #c9efff;
  --color-sky-fall-200: #abddf3;
  --color-sky-fall-300: #84c1dc;
  --color-sky-fall-400: #5daac8;
  --color-sky-fall-500: #3192b4;
  --color-sky-fall-600: #2c7c98;
  --color-sky-fall-700: #23637a;
  --color-sky-fall-800: #16495a;
  --color-sky-fall-900: #0e333f;
  --color-sky-fall-950: #011e28;
}

SCSS

$sky-fall: #6fc1e1;
$sky-fall-rgb: 111, 193, 225;
$sky-fall-light: mix(#fff, $sky-fall, 20%);
$sky-fall-dark: mix(#000, $sky-fall, 20%);

.element {
  color: $sky-fall;
  box-shadow: 0 0 0 2px rgba($sky-fall, 0.35);
}