Ah, the rules of rainy-day royalty.

Dolly may have the coat of many colors, but Queen Elizabeth II has umbrellas in practically every shade of the rainbow.

Her Majesty The Queen may very well have a rainbow-filled room based on how many different brollies we've seen her with over the years, but why?

Here's your answer: "British brand Fulton — which was awarded a Royal Warrant in 2006 — designs bespoke umbrellas to match her majesty’s outfits," writes Zoe Weiner for TODAY.com. "The trim and handle are made to be the exact color of whatever she’s wearing at the time and, based on the photos, we’d venture to guess that there’s an entire rainbow’s worth of them in a hall closet at Buckingham Palace."

Mere mortals can pick up the stylish umbrellas at FultonUmbrellas.com — while they may not be custom-made like Lilibet's, the dome-style, trimmed umbrellas start at £12.00. 

These attention-grabbing umbrellas, along with the Queen's typically bright-colored outfits, likely serve another function. "She needs to stand out for people to be able to say 'I saw the Queen,'" Sophie, Countess of Wessex, said in the Smithsonian Channel documentary "The Queen at 90," as Travel & Leisure originally reported. "Don't forget that when she turns up somewhere, the crowds are two, three, four, 10, 15 deep, and someone wants to be able to say they saw a bit of the Queen's hat as she went past."

All we can say, our dear royal family fans, is prepare to bring your boldly-hued binoculars for Queen-spotting.