After 60 years on the throne the Queen's outfits on her thousands of visits and tours have proved she is a bastion of good taste and style.
But many have wondered what Her Majesty's favourite colour is - until now.
Vogue magazine has studied every outfit she has worn in the last 12 months and found that blue is called royal for a reason.
Vogue chart - Rainbow Queen
Whether the shade be teal, cobalt or powder, 29 per cent of the coats, dresses, suits and hats worn by the Queen have been predominantly that colour.
Although not a colour, Floral was next with 13 per cent, followed by green, worn famously on her visit to Ireland last year and cream - both adorned on 11 per cent of occasions.
Pink and purple - 10 per cent - red, yellow, orange - four per cent - and black - two per cent - were next.
But it appears that beige is her least favourite, wearing it on only one per cent of occasions, matched only by equally-shunned checked patterns.
'The Queen loves clothes and is a real expert on fabrics,' the Queen's personal assistant Angela Kelly told the Telegraph.
'I do think she values my opinion but she is the one who is in control. She always makes the final decision.'
Blue is the colour: Vogue has studied every outfit the Queen has worn in the past year and found that blue is by far her favourite
The Queen in another of her favourite colours, purple, which she wore at two different events earlier this year
Mixed results: Her Majesty likes purple, left, wearing it on 10 per cent of visits but beige is appears to be he least favourite colour
Orange is definitely a favourite and features in her wardrobe fairly often
One tone: The Queen visiting Guildford Cathedral, left, and right, during her first visit to the 2012 Olympic site in late 2005
Daring: The Queen occasionally opts for floral patterns as she did during her visit to the Gulf region, left, and outside Downing Street, centre
Raising a glass: The Queen in her favoured Blue alongside the Duke of Edinburgh during a visit to the Guinness Storehouse where they received an honourary pint
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