#6F5BC6

CSS

:root {
  --simply-purple: #6f5bc6;
  --simply-purple-rgb: 111 91 198;
  --simply-purple-oklch: oklch(0.545 0.16 288.5);
}

.element {
  color: var(--simply-purple);
  background-color: hsl(251 48% 57%);
  border-color: oklch(0.545 0.16 288.5);
}

Tailwind CSS v4

@theme {
  --color-simply-purple: #6f5bc6;
  --color-simply-purple-50: #f4eeff;
  --color-simply-purple-100: #e7dfff;
  --color-simply-purple-200: #d3c9ff;
  --color-simply-purple-300: #b7a8ff;
  --color-simply-purple-400: #9c8cf6;
  --color-simply-purple-500: #856fe8;
  --color-simply-purple-600: #705ec4;
  --color-simply-purple-700: #5a4b9d;
  --color-simply-purple-800: #403776;
  --color-simply-purple-900: #2c2653;
  --color-simply-purple-950: #191438;
}

SCSS

$simply-purple: #6f5bc6;
$simply-purple-rgb: 111, 91, 198;
$simply-purple-light: mix(#fff, $simply-purple, 20%);
$simply-purple-dark: mix(#000, $simply-purple, 20%);

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