If this is the theme of your Minecraft world, and if you're trying to make yourself the king or queen, your throne and the bed in your bedchamber have to be the same color for accuracy. That color must be red, green, blue, black or purple. Yellow and white should be avoided unless it's for the banner of your kingdom and even then should only be used for embellishments on top of one of the other colors.
On the contrary. The specific colors used were regional and picked for vibrancy, and to show off. They were expensive and/or difficult to obtain. So for "accuracy" you would not use blue or red. Blue and red dye are plentiful in Minecraft. Especially red dye. A king wouldn't dye his fabrics with the Same color every farmer would have plenty of with beetroot. Blue used to be expensive, but we have cornflowers now and they're everywhere. You should use colors that are not plentiful. Black and brown, cyan, green if you're far from the desert, etc. And also if we're taking influence from real life, white cloth is a huge flex, because it means you can afford to spend time and money to keep whites white. So you wouldn't use white as your main color, but it'd be everywhere in "rich" builds.
