Soulful Blue

CSS

:root {
  --soulful-blue: #757c91;
  --soulful-blue-rgb: 117 124 145;
  --soulful-blue-oklch: oklch(0.588 0.033 270.8);
}

.element {
  color: var(--soulful-blue);
  background-color: hsl(225 11% 51%);
  border-color: oklch(0.588 0.033 270.8);
}

Tailwind CSS v4

@theme {
  --color-soulful-blue: #757c91;
  --color-soulful-blue-50: #f2f5ff;
  --color-soulful-blue-100: #e4e7f3;
  --color-soulful-blue-200: #cfd4e3;
  --color-soulful-blue-300: #b1b7c9;
  --color-soulful-blue-400: #979eb3;
  --color-soulful-blue-500: #7e859d;
  --color-soulful-blue-600: #6a7185;
  --color-soulful-blue-700: #555a6a;
  --color-soulful-blue-800: #3d424e;
  --color-soulful-blue-900: #2a2e36;
  --color-soulful-blue-950: #181a21;
}

SCSS

$soulful-blue: #757c91;
$soulful-blue-rgb: 117, 124, 145;
$soulful-blue-light: mix(#fff, $soulful-blue, 20%);
$soulful-blue-dark: mix(#000, $soulful-blue, 20%);

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