#4F4D84

CSS

:root {
  --tangent-periwinkle: #4f4d84;
  --tangent-periwinkle-rgb: 79 77 132;
  --tangent-periwinkle-oklch: oklch(0.448 0.089 283.9);
}

.element {
  color: var(--tangent-periwinkle);
  background-color: hsl(242 26% 41%);
  border-color: oklch(0.448 0.089 283.9);
}

Tailwind CSS v4

@theme {
  --color-tangent-periwinkle: #4f4d84;
  --color-tangent-periwinkle-50: #f2f2ff;
  --color-tangent-periwinkle-100: #e5e4ff;
  --color-tangent-periwinkle-200: #d0cff9;
  --color-tangent-periwinkle-300: #b3b1e4;
  --color-tangent-periwinkle-400: #9798d2;
  --color-tangent-periwinkle-500: #7f7ebf;
  --color-tangent-periwinkle-600: #6b6ba1;
  --color-tangent-periwinkle-700: #565581;
  --color-tangent-periwinkle-800: #3d3e60;
  --color-tangent-periwinkle-900: #2a2b44;
  --color-tangent-periwinkle-950: #18182c;
}

SCSS

$tangent-periwinkle: #4f4d84;
$tangent-periwinkle-rgb: 79, 77, 132;
$tangent-periwinkle-light: mix(#fff, $tangent-periwinkle, 20%);
$tangent-periwinkle-dark: mix(#000, $tangent-periwinkle, 20%);

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