#4DA2DF

CSS

:root {
  --high-blue: #4da2df;
  --high-blue-rgb: 77 162 223;
  --high-blue-oklch: oklch(0.686 0.122 242.7);
}

.element {
  color: var(--high-blue);
  background-color: hsl(205 70% 59%);
  border-color: oklch(0.686 0.122 242.7);
}

Tailwind CSS v4

@theme {
  --color-high-blue: #4da2df;
  --color-high-blue-50: #d9faff;
  --color-high-blue-100: #c7edff;
  --color-high-blue-200: #a8dbff;
  --color-high-blue-300: #80bef2;
  --color-high-blue-400: #57a6e0;
  --color-high-blue-500: #278ed0;
  --color-high-blue-600: #2478af;
  --color-high-blue-700: #1d608d;
  --color-high-blue-800: #0f4768;
  --color-high-blue-900: #0a3149;
  --color-high-blue-950: #001d30;
}

SCSS

$high-blue: #4da2df;
$high-blue-rgb: 77, 162, 223;
$high-blue-light: mix(#fff, $high-blue, 20%);
$high-blue-dark: mix(#000, $high-blue, 20%);

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