#40A7C4

CSS

:root {
  --pacific-blue: #40a7c4;
  --pacific-blue-rgb: 64 167 196;
  --pacific-blue-oklch: oklch(0.681 0.102 220);
}

.element {
  color: var(--pacific-blue);
  background-color: hsl(193 53% 51%);
  border-color: oklch(0.681 0.102 220);
}

Tailwind CSS v4

@theme {
  --color-pacific-blue: #40a7c4;
  --color-pacific-blue-50: #d6fdff;
  --color-pacific-blue-100: #c4f0ff;
  --color-pacific-blue-200: #a4dff4;
  --color-pacific-blue-300: #7ac4dd;
  --color-pacific-blue-400: #4eacc8;
  --color-pacific-blue-500: #0395b5;
  --color-pacific-blue-600: #0f7e99;
  --color-pacific-blue-700: #0e657a;
  --color-pacific-blue-800: #054b5a;
  --color-pacific-blue-900: #04343f;
  --color-pacific-blue-950: #001f28;
}

SCSS

$pacific-blue: #40a7c4;
$pacific-blue-rgb: 64, 167, 196;
$pacific-blue-light: mix(#fff, $pacific-blue, 20%);
$pacific-blue-dark: mix(#000, $pacific-blue, 20%);

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