Lightish Blue

CSS

:root {
  --lightish-blue: #3d7afd;
  --lightish-blue-rgb: 61 122 253;
  --lightish-blue-oklch: oklch(0.612 0.206 263);
}

.element {
  color: var(--lightish-blue);
  background-color: hsl(221 98% 62%);
  border-color: oklch(0.612 0.206 263);
}

Tailwind CSS v4

@theme {
  --color-lightish-blue: #3d7afd;
  --color-lightish-blue-50: #d8f5ff;
  --color-lightish-blue-100: #c6e7ff;
  --color-lightish-blue-200: #a9d2ff;
  --color-lightish-blue-300: #83b3ff;
  --color-lightish-blue-400: #5b98ff;
  --color-lightish-blue-500: #3779ff;
  --color-lightish-blue-600: #2f67e1;
  --color-lightish-blue-700: #2553b5;
  --color-lightish-blue-800: #133d88;
  --color-lightish-blue-900: #0c2a60;
  --color-lightish-blue-950: #021742;
}

SCSS

$lightish-blue: #3d7afd;
$lightish-blue-rgb: 61, 122, 253;
$lightish-blue-light: mix(#fff, $lightish-blue, 20%);
$lightish-blue-dark: mix(#000, $lightish-blue, 20%);

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