Everyone thinks that their version of a cup of tea is the correct one.
Sugar being one of the most controversial topics.
But nothing is more important than a tea’s shade: a crucial indicator of its strength and milkiness.
So it’s hardly surprising that a Pantone-style colour guide to tea has recently gone viral with people from all over Britain having become embroiled in a fierce debate as to what’s the ‘correct’ shade of tea.
Coded with letters and numbers, the spectrum goes from totally black and un-milked to what appears to quite literally be milk.
Do you like yours with just a drop of milk and golden in shade, for example?
Or the tea bag given a momentary dip with a good pour of the white stuff in it, leaving it a creamy hue?
When Twitter account Yorkshire Problems tweeted the photo featuring 16 different cups, people soon started replying underneath it with what they believed to be the right one.
While those with verging-on-masochistic tendencies went for hardy colours such as C1 and A2, those unashamed of enjoying something lighter opted for D3 and B4.
Others posted photos of their tea in the hope a qualified tea-whisperer could identify which code theirs was.
Things soon got heated, with some Twitter users getting personal about those who preferred certain cups.
And others debated whether tea bags should even be taken out at all.
But amongst all of the blood and tears being shed, one cup of tea seems to have prevailed above all others: D2.
What do you think? Does the thought of drinking D2 fill you with warm satisfaction or make you want to declare war on the rest of the country?
Read more from Yahoo Style UK: