Purplish Blue

CSS

:root {
  --purplish-blue: #6140ef;
  --purplish-blue-rgb: 97 64 239;
  --purplish-blue-oklch: oklch(0.525 0.245 282.6);
}

.element {
  color: var(--purplish-blue);
  background-color: hsl(251 85% 59%);
  border-color: oklch(0.525 0.245 282.6);
}

Tailwind CSS v4

@theme {
  --color-purplish-blue: #6140ef;
  --color-purplish-blue-50: #edecff;
  --color-purplish-blue-100: #deddff;
  --color-purplish-blue-200: #c9c4ff;
  --color-purplish-blue-300: #aca1ff;
  --color-purplish-blue-400: #8f80ff;
  --color-purplish-blue-500: #7a5aff;
  --color-purplish-blue-600: #674ef1;
  --color-purplish-blue-700: #523ec2;
  --color-purplish-blue-800: #382d93;
  --color-purplish-blue-900: #261f68;
  --color-purplish-blue-950: #160d48;
}

SCSS

$purplish-blue: #6140ef;
$purplish-blue-rgb: 97, 64, 239;
$purplish-blue-light: mix(#fff, $purplish-blue, 20%);
$purplish-blue-dark: mix(#000, $purplish-blue, 20%);

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