#BFBCD3

CSS

:root {
  --blue-haze: #bfbcd3;
  --blue-haze-rgb: 191 188 211;
  --blue-haze-oklch: oklch(0.805 0.032 291.6);
}

.element {
  color: var(--blue-haze);
  background-color: hsl(248 21% 78%);
  border-color: oklch(0.805 0.032 291.6);
}

Tailwind CSS v4

@theme {
  --color-blue-haze: #bfbcd3;
  --color-blue-haze-50: #f5f4fe;
  --color-blue-haze-100: #e8e6f2;
  --color-blue-haze-200: #d4d2e1;
  --color-blue-haze-300: #b8b5c7;
  --color-blue-haze-400: #9e9bb0;
  --color-blue-haze-500: #86839a;
  --color-blue-haze-600: #716f83;
  --color-blue-haze-700: #5b5869;
  --color-blue-haze-800: #42414d;
  --color-blue-haze-900: #2d2d36;
  --color-blue-haze-950: #1a1a21;
}

SCSS

$blue-haze: #bfbcd3;
$blue-haze-rgb: 191, 188, 211;
$blue-haze-light: mix(#fff, $blue-haze, 20%);
$blue-haze-dark: mix(#000, $blue-haze, 20%);

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