#675FC3

CSS

:root {
  --simply-purple: #675fc3;
  --simply-purple-rgb: 103 95 195;
  --simply-purple-oklch: oklch(0.543 0.151 283.8);
}

.element {
  color: var(--simply-purple);
  background-color: hsl(245 45% 57%);
  border-color: oklch(0.543 0.151 283.8);
}

Tailwind CSS v4

@theme {
  --color-simply-purple: #675fc3;
  --color-simply-purple-50: #f0f0ff;
  --color-simply-purple-100: #e3e1ff;
  --color-simply-purple-200: #cecbff;
  --color-simply-purple-300: #b0acff;
  --color-simply-purple-400: #9490f4;
  --color-simply-purple-500: #7c74e5;
  --color-simply-purple-600: #6962c1;
  --color-simply-purple-700: #544f9b;
  --color-simply-purple-800: #3b3a75;
  --color-simply-purple-900: #282852;
  --color-simply-purple-950: #171537;
}

SCSS

$simply-purple: #675fc3;
$simply-purple-rgb: 103, 95, 195;
$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);
}