<![CDATA[The Netherlands, the United Kingdom, the USA, France, Chile, Cuba, Australia and Croatia; this diverse group of countries, and many more besides, all have red, white and blue flags. Is this just a coincidence, or is there some deeper explanation?
One popular theory on the frequency of red, white and blue flags relates to the ease with which red and blue dye can be created. Since so many flags are ultimately based on centuries old family or city flags, the reasoning is that red and blue are so common because they are a tradition born from a practical necessity.
Although providing some explanation, it doesn't completely delineate how the three colours ascended to such prominence with the rise of nation states and continue to be so common to this day.
In some instances, fairly obvious historical or political factors can explain the recurrence of the colours. The flags of both Australia and New Zealand for instance, are dominated by red, white and blue due to the presence of the Union Jack, reflecting their history as former British colonies and continued membership of the Commonwealth.
These logical historical and political connections are not always so clear, however, and it's necessary to look at individual flag histories to see how they came to be red, white and blue.
One of the oldest flags in existence, the Dutch flag is also one of the most influential - providing a wealth of insight. In the sixteenth century William I, prince of Orange led the Dutch independence movement against the Spanish. His livery of orange, white and blue was worn by his troops at the siege of Leiden and quickly became the chosen colours of the Dutch nationalist movement.
From 1577, an orange, white and blue horizontal tricolor became the flag for Dutch ships, although it was never officially adopted. By 1660, the orange in the flag had been replaced by red. Exactly why this took place is a matter debated among historians.
Some say it was because red dyes were cheaper than orange, or that the orange dyes tended to turn to red over time anyway. Another explanation is that a 1654 defence treaty between the Dutch and British had seen members of the house of Orange excluded from being heads of state in the Netherlands.
Whatever the explanation, the red, white and blue tricolor was legalised as the state flag by the Batavian Republic in 1796.
The tricolor soon started to spread, and so did the Dutch colour scheme.