#53A2DA

CSS

:root {
  --high-blue: #53a2da;
  --high-blue-rgb: 83 162 218;
  --high-blue-oklch: oklch(0.686 0.114 241.9);
}

.element {
  color: var(--high-blue);
  background-color: hsl(205 65% 59%);
  border-color: oklch(0.686 0.114 241.9);
}

Tailwind CSS v4

@theme {
  --color-high-blue: #53a2da;
  --color-high-blue-50: #dafaff;
  --color-high-blue-100: #c9edff;
  --color-high-blue-200: #abdaff;
  --color-high-blue-300: #84beee;
  --color-high-blue-400: #5ca6dc;
  --color-high-blue-500: #318eca;
  --color-high-blue-600: #2c78ab;
  --color-high-blue-700: #236089;
  --color-high-blue-800: #144765;
  --color-high-blue-900: #0d3147;
  --color-high-blue-950: #011d2f;
}

SCSS

$high-blue: #53a2da;
$high-blue-rgb: 83, 162, 218;
$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);
}