#90B6E4

CSS

:root {
  --adrift-on-the-nile: #90b6e4;
  --adrift-on-the-nile-rgb: 144 182 228;
  --adrift-on-the-nile-oklch: oklch(0.765 0.078 253.5);
}

.element {
  color: var(--adrift-on-the-nile);
  background-color: hsl(213 61% 73%);
  border-color: oklch(0.765 0.078 253.5);
}

Tailwind CSS v4

@theme {
  --color-adrift-on-the-nile: #90b6e4;
  --color-adrift-on-the-nile-50: #e7f7ff;
  --color-adrift-on-the-nile-100: #d7eaff;
  --color-adrift-on-the-nile-200: #bfd6f6;
  --color-adrift-on-the-nile-300: #9dbae0;
  --color-adrift-on-the-nile-400: #7ea1cc;
  --color-adrift-on-the-nile-500: #6189b9;
  --color-adrift-on-the-nile-600: #52749c;
  --color-adrift-on-the-nile-700: #425d7d;
  --color-adrift-on-the-nile-800: #2e445d;
  --color-adrift-on-the-nile-900: #1f2f41;
  --color-adrift-on-the-nile-950: #0f1c2a;
}

SCSS

$adrift-on-the-nile: #90b6e4;
$adrift-on-the-nile-rgb: 144, 182, 228;
$adrift-on-the-nile-light: mix(#fff, $adrift-on-the-nile, 20%);
$adrift-on-the-nile-dark: mix(#000, $adrift-on-the-nile, 20%);

.element {
  color: $adrift-on-the-nile;
  box-shadow: 0 0 0 2px rgba($adrift-on-the-nile, 0.35);
}