#146CC8

CSS

:root {
  --matt-blue: #146cc8;
  --matt-blue-rgb: 20 108 200;
  --matt-blue-oklch: oklch(0.535 0.163 254.5);
}

.element {
  color: var(--matt-blue);
  background-color: hsl(211 82% 43%);
  border-color: oklch(0.535 0.163 254.5);
}

Tailwind CSS v4

@theme {
  --color-matt-blue: #146cc8;
  --color-matt-blue-50: #d8f8ff;
  --color-matt-blue-100: #c5ebff;
  --color-matt-blue-200: #a7d7ff;
  --color-matt-blue-300: #7fbaff;
  --color-matt-blue-400: #55a0fc;
  --color-matt-blue-500: #2786ee;
  --color-matt-blue-600: #2371c9;
  --color-matt-blue-700: #1c5ba1;
  --color-matt-blue-800: #0c4378;
  --color-matt-blue-900: #082e55;
  --color-matt-blue-950: #001a39;
}

SCSS

$matt-blue: #146cc8;
$matt-blue-rgb: 20, 108, 200;
$matt-blue-light: mix(#fff, $matt-blue, 20%);
$matt-blue-dark: mix(#000, $matt-blue, 20%);

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