Tool Blue

CSS

:root {
  --tool-blue: #637985;
  --tool-blue-rgb: 99 121 133;
  --tool-blue-oklch: oklch(0.563 0.032 231.9);
}

.element {
  color: var(--tool-blue);
  background-color: hsl(201 15% 45%);
  border-color: oklch(0.563 0.032 231.9);
}

Tailwind CSS v4

@theme {
  --color-tool-blue: #637985;
  --color-tool-blue-50: #edf7fd;
  --color-tool-blue-100: #deeaf1;
  --color-tool-blue-200: #c8d7e0;
  --color-tool-blue-300: #a8bbc5;
  --color-tool-blue-400: #8ca2ae;
  --color-tool-blue-500: #728a98;
  --color-tool-blue-600: #607580;
  --color-tool-blue-700: #4d5e67;
  --color-tool-blue-800: #37454b;
  --color-tool-blue-900: #262f34;
  --color-tool-blue-950: #141c20;
}

SCSS

$tool-blue: #637985;
$tool-blue-rgb: 99, 121, 133;
$tool-blue-light: mix(#fff, $tool-blue, 20%);
$tool-blue-dark: mix(#000, $tool-blue, 20%);

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