#F5FDD9

CSS

:root {
  --race-the-sun: #f5fdd9;
  --race-the-sun-rgb: 245 253 217;
  --race-the-sun-oklch: oklch(0.979 0.048 117.5);
}

.element {
  color: var(--race-the-sun);
  background-color: hsl(73 90% 92%);
  border-color: oklch(0.979 0.048 117.5);
}

Tailwind CSS v4

@theme {
  --color-race-the-sun: #f5fdd9;
  --color-race-the-sun-50: #f3f7e8;
  --color-race-the-sun-100: #e6ead9;
  --color-race-the-sun-200: #d1d8c1;
  --color-race-the-sun-300: #b4bba0;
  --color-race-the-sun-400: #9ca383;
  --color-race-the-sun-500: #838b67;
  --color-race-the-sun-600: #6f7557;
  --color-race-the-sun-700: #595e46;
  --color-race-the-sun-800: #414532;
  --color-race-the-sun-900: #2d2f22;
  --color-race-the-sun-950: #1a1c11;
}

SCSS

$race-the-sun: #f5fdd9;
$race-the-sun-rgb: 245, 253, 217;
$race-the-sun-light: mix(#fff, $race-the-sun, 20%);
$race-the-sun-dark: mix(#000, $race-the-sun, 20%);

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