Mordant Blue

CSS

:root {
  --mordant-blue: #2a6671;
  --mordant-blue-rgb: 42 102 113;
  --mordant-blue-oklch: oklch(0.476 0.064 211.5);
}

.element {
  color: var(--mordant-blue);
  background-color: hsl(189 46% 30%);
  border-color: oklch(0.476 0.064 211.5);
}

Tailwind CSS v4

@theme {
  --color-mordant-blue: #2a6671;
  --color-mordant-blue-50: #e2faff;
  --color-mordant-blue-100: #d1eef5;
  --color-mordant-blue-200: #b6dce5;
  --color-mordant-blue-300: #92c0cb;
  --color-mordant-blue-400: #71a9b4;
  --color-mordant-blue-500: #4f929e;
  --color-mordant-blue-600: #447b86;
  --color-mordant-blue-700: #36636b;
  --color-mordant-blue-800: #26494e;
  --color-mordant-blue-900: #193237;
  --color-mordant-blue-950: #091e21;
}

SCSS

$mordant-blue: #2a6671;
$mordant-blue-rgb: 42, 102, 113;
$mordant-blue-light: mix(#fff, $mordant-blue, 20%);
$mordant-blue-dark: mix(#000, $mordant-blue, 20%);

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