Blue Bird Day

CSS

:root {
  --blue-bird-day: #237fac;
  --blue-bird-day-rgb: 35 127 172;
  --blue-bird-day-oklch: oklch(0.565 0.108 235.2);
}

.element {
  color: var(--blue-bird-day);
  background-color: hsl(200 66% 41%);
  border-color: oklch(0.565 0.108 235.2);
}

Tailwind CSS v4

@theme {
  --color-blue-bird-day: #237fac;
  --color-blue-bird-day-50: #d9fbff;
  --color-blue-bird-day-100: #c7eeff;
  --color-blue-bird-day-200: #a9dcfd;
  --color-blue-bird-day-300: #81c0e8;
  --color-blue-bird-day-400: #58a8d5;
  --color-blue-bird-day-500: #2990c3;
  --color-blue-bird-day-600: #257aa5;
  --color-blue-bird-day-700: #1e6284;
  --color-blue-bird-day-800: #114861;
  --color-blue-bird-day-900: #0b3244;
  --color-blue-bird-day-950: #001e2c;
}

SCSS

$blue-bird-day: #237fac;
$blue-bird-day-rgb: 35, 127, 172;
$blue-bird-day-light: mix(#fff, $blue-bird-day, 20%);
$blue-bird-day-dark: mix(#000, $blue-bird-day, 20%);

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