#CB8F28

CSS

:root {
  --end-of-summer: #cb8f28;
  --end-of-summer-rgb: 203 143 40;
  --end-of-summer-oklch: oklch(0.693 0.133 75.7);
}

.element {
  color: var(--end-of-summer);
  background-color: hsl(38 67% 48%);
  border-color: oklch(0.693 0.133 75.7);
}

Tailwind CSS v4

@theme {
  --color-end-of-summer: #cb8f28;
  --color-end-of-summer-50: #fff1cb;
  --color-end-of-summer-100: #ffe3b7;
  --color-end-of-summer-200: #f4ce93;
  --color-end-of-summer-300: #ddaf65;
  --color-end-of-summer-400: #cb9235;
  --color-end-of-summer-500: #b87700;
  --color-end-of-summer-600: #9b6500;
  --color-end-of-summer-700: #7c5000;
  --color-end-of-summer-800: #5d3a00;
  --color-end-of-summer-900: #412800;
  --color-end-of-summer-950: #2a1500;
}

SCSS

$end-of-summer: #cb8f28;
$end-of-summer-rgb: 203, 143, 40;
$end-of-summer-light: mix(#fff, $end-of-summer, 20%);
$end-of-summer-dark: mix(#000, $end-of-summer, 20%);

.element {
  color: $end-of-summer;
  box-shadow: 0 0 0 2px rgba($end-of-summer, 0.35);
}