The Fifth Sun

CSS

:root {
  --the-fifth-sun: #f0e22c;
  --the-fifth-sun-rgb: 240 226 44;
  --the-fifth-sun-oklch: oklch(0.896 0.181 104.7);
}

.element {
  color: var(--the-fifth-sun);
  background-color: hsl(56 87% 56%);
  border-color: oklch(0.896 0.181 104.7);
}

Tailwind CSS v4

@theme {
  --color-the-fifth-sun: #f0e22c;
  --color-the-fifth-sun-50: #fbf9bd;
  --color-the-fifth-sun-100: #efeda6;
  --color-the-fifth-sun-200: #ddda7b;
  --color-the-fifth-sun-300: #c3bd3e;
  --color-the-fifth-sun-400: #b0a200;
  --color-the-fifth-sun-500: #9b8900;
  --color-the-fifth-sun-600: #837400;
  --color-the-fifth-sun-700: #695d00;
  --color-the-fifth-sun-800: #4f4300;
  --color-the-fifth-sun-900: #372e00;
  --color-the-fifth-sun-950: #221b00;
}

SCSS

$the-fifth-sun: #f0e22c;
$the-fifth-sun-rgb: 240, 226, 44;
$the-fifth-sun-light: mix(#fff, $the-fifth-sun, 20%);
$the-fifth-sun-dark: mix(#000, $the-fifth-sun, 20%);

.element {
  color: $the-fifth-sun;
  box-shadow: 0 0 0 2px rgba($the-fifth-sun, 0.35);
}