#88BFDC

CSS

:root {
  --sky-fall: #88bfdc;
  --sky-fall-rgb: 136 191 220;
  --sky-fall-oklch: oklch(0.777 0.071 231.8);
}

.element {
  color: var(--sky-fall);
  background-color: hsl(201 55% 70%);
  border-color: oklch(0.777 0.071 231.8);
}

Tailwind CSS v4

@theme {
  --color-sky-fall: #88bfdc;
  --color-sky-fall-50: #e2f9ff;
  --color-sky-fall-100: #d2ecfc;
  --color-sky-fall-200: #b8daee;
  --color-sky-fall-300: #94bed6;
  --color-sky-fall-400: #73a6c1;
  --color-sky-fall-500: #528fad;
  --color-sky-fall-600: #477992;
  --color-sky-fall-700: #386175;
  --color-sky-fall-800: #274756;
  --color-sky-fall-900: #1a313c;
  --color-sky-fall-950: #0a1d26;
}

SCSS

$sky-fall: #88bfdc;
$sky-fall-rgb: 136, 191, 220;
$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);
}