#00A3E8

CSS

:root {
  --high-blue: #00a3e8;
  --high-blue-rgb: 0 163 232;
  --high-blue-oklch: oklch(0.679 0.149 237.6);
}

.element {
  color: var(--high-blue);
  background-color: hsl(198 100% 45%);
  border-color: oklch(0.679 0.149 237.6);
}

Tailwind CSS v4

@theme {
  --color-high-blue: #00a3e8;
  --color-high-blue-50: #cffcff;
  --color-high-blue-100: #bbf0ff;
  --color-high-blue-200: #98ddff;
  --color-high-blue-300: #69c1fc;
  --color-high-blue-400: #2baaeb;
  --color-high-blue-500: #0091dc;
  --color-high-blue-600: #007bb9;
  --color-high-blue-700: #006295;
  --color-high-blue-800: #00496e;
  --color-high-blue-900: #00324e;
  --color-high-blue-950: #001e34;
}

SCSS

$high-blue: #00a3e8;
$high-blue-rgb: 0, 163, 232;
$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);
}