#D0E0ED

CSS

:root {
  --hint-of-blue: #d0e0ed;
  --hint-of-blue-rgb: 208 224 237;
  --hint-of-blue-oklch: oklch(0.899 0.025 242.4);
}

.element {
  color: var(--hint-of-blue);
  background-color: hsl(207 45% 87%);
  border-color: oklch(0.899 0.025 242.4);
}

Tailwind CSS v4

@theme {
  --color-hint-of-blue: #d0e0ed;
  --color-hint-of-blue-50: #eff6fc;
  --color-hint-of-blue-100: #e1e9f0;
  --color-hint-of-blue-200: #ccd6de;
  --color-hint-of-blue-300: #adb9c3;
  --color-hint-of-blue-400: #92a1ac;
  --color-hint-of-blue-500: #788996;
  --color-hint-of-blue-600: #66747e;
  --color-hint-of-blue-700: #515c65;
  --color-hint-of-blue-800: #3b444a;
  --color-hint-of-blue-900: #282f34;
  --color-hint-of-blue-950: #161b1f;
}

SCSS

$hint-of-blue: #d0e0ed;
$hint-of-blue-rgb: 208, 224, 237;
$hint-of-blue-light: mix(#fff, $hint-of-blue, 20%);
$hint-of-blue-dark: mix(#000, $hint-of-blue, 20%);

.element {
  color: $hint-of-blue;
  box-shadow: 0 0 0 2px rgba($hint-of-blue, 0.35);
}