I thought this really should be put as one contiguous piece rather than lots of little points here and there. To start the analysis of the city state colour-type combinations again from the beginning, I thought it might be good to look at how they changed throughout the game so far. Below is the initial list by colours as they appear:
MINOR_WHITE
Warsaw - Cultured
MINOR_GREY
Edinburgh - Militaristic
MINOR_BLUE
Dublin - Militaristic
Oslo - Maritime
MINOR_MIDDLE_BLUE
Geneve - Cultured
Copenhagen - Maritime
Stockholm - Maritime
MINOR_CYAN
Venice - Maritime
Florence - Cultured
MINOR_MIDDLE_CYAN
Genoa - Maritime
Ragusa - Maritime
MINOR_GREEN
Helsinki - Maritime
Belgrade - Militaristic
Tyre - Militaristic
MINOR_LIGHT_GREEN
Bucharest - Cultured
Vienna - Cultured
MINOR_PEACH
Budapest - Militaristic
MINOR_LIGHT_BLUE
Brussels - Cultured
MINOR_PURPLE
Monaca - Cultured
MINOR_MIDDLE PURPLE
Seoul - Cultured
Sidon - Militaristic
MINOR_LIGHT_PURPLE
Hanoi - Militaristic
Lhasa - Cultured
MINOR_LIGHT_ORANGE
Almaty - Militaristic
Cape Town - Maritime
MINOR_YELLOW
Kuala Lumpur - Cultured
MINOR_LIGHT_YELLOW
Singapore - Maritime
Rio de Janeiro - Maritime
What is immediately obvious is that in the original game the colour-type combinations, unlike in the Gods & Kings list, did double up. Notably Genoa and Ragusa, Bucharest and Vienna, Belgrade and Tyre as well as Copenhagen and Stockholm. The numbers of city states were also different:
Militaristic: 8
Cultured: 10
Maritime: 10
That is, they were slightly more militaristic city states (as there were only 6 in Gods & Kings). Following the release of Vanilla there was a few DLC that replaced city states:
Denmark DLC - Copenhagen and Oslo replaced
Korea DLC - Seoul replaced
Their replacements were:
Sydney replaced Copenhagen - MINOR_MIDDLE_BLUE and Maritime
Quebec City replaced Oslo - MINOR_BLUE and Maritime
Kathmandu replaced Seoul - MINOR_MIDDLE_PURPLE and Cultured
The file replacing them was quite direct in that it said: "Replacement names for old city-state names used in DLC civs", in the file, so it is clear enough what they did here.
With Gods & Kings they added a two new types of city states, and rebalanced it so it was:
Cultured: 10
Maritime: 10
Mercantile: 10
Religious: 6
Militaristic: 6
This obviously changed things around, a lot in fact. The question then becomes what they did as they did this. One notable change is that they seemed to use existing city states, at least initially, to replace the ones replaced in the expansion. These were:
Dublin, Ediburgh - Celts
Vienna - Austria
Stockholm, Helsinki - Sweden
What's also an interesting aside is that some files here are actually written referencing to them as City States, rather than "Minor Civs" as they are in most of the files. In any case, the direct replacements for these are, for colour and type at least:
No city state replaced Dublin - MINOR_BLUE, Militaristic
Budapest replaced Edinburgh - MINOR_GREY, Militaristic
Lhasa replaced Vienna* - MINOR_LIGHT_GREEN, Cultured
Mombasa replaced Helsinki - MINOR_GREEN, Maritime
No city state replaced Stockholm** - MINOR_MIDDLE_BLUE, Maritime
*Bucharest also shared this combination, but Lhasa was changed from Cultured to Relgious seemingly after this change was made
**Sydney is of this type combination, but replaced Copenhagen earlier
So here it certainly seemed as though as part of adding in such a large number of new city states they did things a bit differently. Here is the fully list of city states afterwards by colour and type:
MINOR_WHITE
Warsaw - Cultured
Cahokia - Mercantile
Jerusalem - Religious
MINOR_GRAY
Budapest - Militaristic
Jakarta - Maritime
Zurich - Mercantile
MINOR_MIDDLE_BLUE
Geneva - Religious
Sydney - Maritime
MINOR_CYAN
Venice - Maritime
Florence - Cultured
La Venta - Religious
MINOR_MIDDLE_CYAN
Genoa - Mercantile
Ragusa - Maritime
MINOR_BLUE
Quebec City - Maritime
Hong Kong - Mercantile
Prague - Culture
MINOR_LIGHT_GREEN
Bucharest - Cultured
Lhasa - Religious
Manila - Maritime
MINOR_GREEN
Belgrade - Militaristic
Tyre - Mercantile
Mombasa - Maritime
MINOR_LIGHT_BLUE
Brussels - Cultured
Zanzibar - Mercantile
MINOR_PURPLE
Monaco - Cultured
Antwerp - Mercantile
Lisbon - Maritime
MINOR_PEACH
Marrakech - Mercantile
Yerevan - Cultured
MINOR_LIGHT_ORANGE
Milan - Cultured
Almaty - Militaristic
Cape Town - Maritime
MINOR_MIDDLE_PURPLE
Kathmandu - Cultured
Sidon - Militaristic
MINOR_LIGHT_PURPLE
Hanoi - Militaristic
Colombo - Mercantile
Wittenberg - Religious
MINOR_LIGHT_YELLOW
Rio de Janeiro - Maritime
Vatican City - Religious
Singapore - Mercantile
MINOR_YELLOW
Kuala Lumpur - Cultured
Valletta - Militaristic
What is interesting is that here there are no more identical colour-type combinations. The changed were:
Budapest - MINOR_PEACH, Militaristic => MINOR_GREY, Militaristic - Replaced Edinburgh
Geneva - MINOR_MIDDLE_BLUE, Culture => MINOR_MIDDLE_BLUE, Religious
Genoa - MINOR_MIDDLE_CYAN, Maritime => MINOR_MIDDLE_CYAN, Mercantile
Tyre - MINOR_GREEN, Militaristic => MINOR_GREEN, Mercantile
Lhasa - MINOR_LIGHT_PURPLE, Cultured => MINOR_LIGHT_GREEN, Religious
Singapore - MINOR_LIGHT_YELLOW, Maritime => MINOR_LIGHT_YELLOW, Mercantile
Of those only two changed their colour, Budapest and Lhasa, and these seemingly replaced a pair of removed City States. One of the interesting points about Gods & Kings is that they made it so each colour-type combination was now unique. I'm not actually certain that this was intentional, but it certainly has been done.
In any case, from everything so far it's clear that they replace city states by giving the colour and type to a new one, this has been repeated a few times. It's a bit trickier in Gods & Kings to analyse this as they change a few more things than just a couple of city state names, but it can still be followed. Despite lots of new city states though, they didn't give any used colour-type combinations, and other changes meant that they became unique. Looking at vanilla however I'm not sure if this is entirely significant or not, however, it does seem that they have no given an identical colour-type combination to a new added city state, and there were a lot added in Gods & Kings.
So, what can be concluded from this:
1. They generally do direct replacements when removing city states to make civilizations
2. They have changed the number of each type of city state before (from 8 militaristic city states in vanilla to 6 in Gods & Kings)
3. As part of the change and rebalance of Gods & Kings they did not replace Dublin and Stockholm directly
4. In Vanilla colour-type combinations were not unique
5. They are however unique in Gods & Kings
6. They have not given a used colour-type combination to a newly added city state before
Where from here though. We have seen plenty of city states in screenshots for Brave New World. The first thing to note is that, as would be expected, without any major changes to the types (that is, they haven't added new types this time), the city states that we had in Gods & Kings appear to have the same colour type combinations. We have also seen that the ones that would have had to have been replaced (Warsaw, Rio de Janeiro and Lisbon) have been for type and colour, as the above would have suggested:
Bratislava - MINOR_WHITE, Cultured - replaces Warsaw
Ur - MINOR_PURPLE, Maritime - replaces Lisbon
Panama City - MINOR_LIGHT_YELLOW - replaces Rio de Janeiro
We have also seen a new city state colour combination:
Sofia - MINOR_LIGHT_GREEN, Militaristic
This appears to indicate that it is a new addition all together, and may suggest them adding more Militaristic city states back to to rebalance the numbers a bit, much like how they lowered the number of militaristic city states from 8 to 6 between vanilla and Gods & Kings.
Finally, we have one new piece of information from all of that. We have a new city state:
Riga - MINOR_MIDDLE_CYAN, Maritime
This has Ragusa's colour and type combination, and as noted above, whilst they while changing things for Gods & Kings (new types and rebalance) did change two colours and did not replace two city states that were removed during that whole process they did not make any new city states with previously used combinations and the two colour changes were to combinations of city states that were removed. As such, the only conclusion that fits what has been seen before is that Ragusa has been replaced in this case by Riga, take from that what you will.
MINOR_WHITE
Warsaw - Cultured
MINOR_GREY
Edinburgh - Militaristic
MINOR_BLUE
Dublin - Militaristic
Oslo - Maritime
MINOR_MIDDLE_BLUE
Geneve - Cultured
Copenhagen - Maritime
Stockholm - Maritime
MINOR_CYAN
Venice - Maritime
Florence - Cultured
MINOR_MIDDLE_CYAN
Genoa - Maritime
Ragusa - Maritime
MINOR_GREEN
Helsinki - Maritime
Belgrade - Militaristic
Tyre - Militaristic
MINOR_LIGHT_GREEN
Bucharest - Cultured
Vienna - Cultured
MINOR_PEACH
Budapest - Militaristic
MINOR_LIGHT_BLUE
Brussels - Cultured
MINOR_PURPLE
Monaca - Cultured
MINOR_MIDDLE PURPLE
Seoul - Cultured
Sidon - Militaristic
MINOR_LIGHT_PURPLE
Hanoi - Militaristic
Lhasa - Cultured
MINOR_LIGHT_ORANGE
Almaty - Militaristic
Cape Town - Maritime
MINOR_YELLOW
Kuala Lumpur - Cultured
MINOR_LIGHT_YELLOW
Singapore - Maritime
Rio de Janeiro - Maritime
What is immediately obvious is that in the original game the colour-type combinations, unlike in the Gods & Kings list, did double up. Notably Genoa and Ragusa, Bucharest and Vienna, Belgrade and Tyre as well as Copenhagen and Stockholm. The numbers of city states were also different:
Militaristic: 8
Cultured: 10
Maritime: 10
That is, they were slightly more militaristic city states (as there were only 6 in Gods & Kings). Following the release of Vanilla there was a few DLC that replaced city states:
Denmark DLC - Copenhagen and Oslo replaced
Korea DLC - Seoul replaced
Their replacements were:
Sydney replaced Copenhagen - MINOR_MIDDLE_BLUE and Maritime
Quebec City replaced Oslo - MINOR_BLUE and Maritime
Kathmandu replaced Seoul - MINOR_MIDDLE_PURPLE and Cultured
The file replacing them was quite direct in that it said: "Replacement names for old city-state names used in DLC civs", in the file, so it is clear enough what they did here.
With Gods & Kings they added a two new types of city states, and rebalanced it so it was:
Cultured: 10
Maritime: 10
Mercantile: 10
Religious: 6
Militaristic: 6
This obviously changed things around, a lot in fact. The question then becomes what they did as they did this. One notable change is that they seemed to use existing city states, at least initially, to replace the ones replaced in the expansion. These were:
Dublin, Ediburgh - Celts
Vienna - Austria
Stockholm, Helsinki - Sweden
What's also an interesting aside is that some files here are actually written referencing to them as City States, rather than "Minor Civs" as they are in most of the files. In any case, the direct replacements for these are, for colour and type at least:
No city state replaced Dublin - MINOR_BLUE, Militaristic
Budapest replaced Edinburgh - MINOR_GREY, Militaristic
Lhasa replaced Vienna* - MINOR_LIGHT_GREEN, Cultured
Mombasa replaced Helsinki - MINOR_GREEN, Maritime
No city state replaced Stockholm** - MINOR_MIDDLE_BLUE, Maritime
*Bucharest also shared this combination, but Lhasa was changed from Cultured to Relgious seemingly after this change was made
**Sydney is of this type combination, but replaced Copenhagen earlier
So here it certainly seemed as though as part of adding in such a large number of new city states they did things a bit differently. Here is the fully list of city states afterwards by colour and type:
MINOR_WHITE
Warsaw - Cultured
Cahokia - Mercantile
Jerusalem - Religious
MINOR_GRAY
Budapest - Militaristic
Jakarta - Maritime
Zurich - Mercantile
MINOR_MIDDLE_BLUE
Geneva - Religious
Sydney - Maritime
MINOR_CYAN
Venice - Maritime
Florence - Cultured
La Venta - Religious
MINOR_MIDDLE_CYAN
Genoa - Mercantile
Ragusa - Maritime
MINOR_BLUE
Quebec City - Maritime
Hong Kong - Mercantile
Prague - Culture
MINOR_LIGHT_GREEN
Bucharest - Cultured
Lhasa - Religious
Manila - Maritime
MINOR_GREEN
Belgrade - Militaristic
Tyre - Mercantile
Mombasa - Maritime
MINOR_LIGHT_BLUE
Brussels - Cultured
Zanzibar - Mercantile
MINOR_PURPLE
Monaco - Cultured
Antwerp - Mercantile
Lisbon - Maritime
MINOR_PEACH
Marrakech - Mercantile
Yerevan - Cultured
MINOR_LIGHT_ORANGE
Milan - Cultured
Almaty - Militaristic
Cape Town - Maritime
MINOR_MIDDLE_PURPLE
Kathmandu - Cultured
Sidon - Militaristic
MINOR_LIGHT_PURPLE
Hanoi - Militaristic
Colombo - Mercantile
Wittenberg - Religious
MINOR_LIGHT_YELLOW
Rio de Janeiro - Maritime
Vatican City - Religious
Singapore - Mercantile
MINOR_YELLOW
Kuala Lumpur - Cultured
Valletta - Militaristic
What is interesting is that here there are no more identical colour-type combinations. The changed were:
Budapest - MINOR_PEACH, Militaristic => MINOR_GREY, Militaristic - Replaced Edinburgh
Geneva - MINOR_MIDDLE_BLUE, Culture => MINOR_MIDDLE_BLUE, Religious
Genoa - MINOR_MIDDLE_CYAN, Maritime => MINOR_MIDDLE_CYAN, Mercantile
Tyre - MINOR_GREEN, Militaristic => MINOR_GREEN, Mercantile
Lhasa - MINOR_LIGHT_PURPLE, Cultured => MINOR_LIGHT_GREEN, Religious
Singapore - MINOR_LIGHT_YELLOW, Maritime => MINOR_LIGHT_YELLOW, Mercantile
Of those only two changed their colour, Budapest and Lhasa, and these seemingly replaced a pair of removed City States. One of the interesting points about Gods & Kings is that they made it so each colour-type combination was now unique. I'm not actually certain that this was intentional, but it certainly has been done.
In any case, from everything so far it's clear that they replace city states by giving the colour and type to a new one, this has been repeated a few times. It's a bit trickier in Gods & Kings to analyse this as they change a few more things than just a couple of city state names, but it can still be followed. Despite lots of new city states though, they didn't give any used colour-type combinations, and other changes meant that they became unique. Looking at vanilla however I'm not sure if this is entirely significant or not, however, it does seem that they have no given an identical colour-type combination to a new added city state, and there were a lot added in Gods & Kings.
So, what can be concluded from this:
1. They generally do direct replacements when removing city states to make civilizations
2. They have changed the number of each type of city state before (from 8 militaristic city states in vanilla to 6 in Gods & Kings)
3. As part of the change and rebalance of Gods & Kings they did not replace Dublin and Stockholm directly
4. In Vanilla colour-type combinations were not unique
5. They are however unique in Gods & Kings
6. They have not given a used colour-type combination to a newly added city state before
Where from here though. We have seen plenty of city states in screenshots for Brave New World. The first thing to note is that, as would be expected, without any major changes to the types (that is, they haven't added new types this time), the city states that we had in Gods & Kings appear to have the same colour type combinations. We have also seen that the ones that would have had to have been replaced (Warsaw, Rio de Janeiro and Lisbon) have been for type and colour, as the above would have suggested:
Bratislava - MINOR_WHITE, Cultured - replaces Warsaw
Ur - MINOR_PURPLE, Maritime - replaces Lisbon
Panama City - MINOR_LIGHT_YELLOW - replaces Rio de Janeiro
We have also seen a new city state colour combination:
Sofia - MINOR_LIGHT_GREEN, Militaristic
This appears to indicate that it is a new addition all together, and may suggest them adding more Militaristic city states back to to rebalance the numbers a bit, much like how they lowered the number of militaristic city states from 8 to 6 between vanilla and Gods & Kings.
Finally, we have one new piece of information from all of that. We have a new city state:
Riga - MINOR_MIDDLE_CYAN, Maritime
This has Ragusa's colour and type combination, and as noted above, whilst they while changing things for Gods & Kings (new types and rebalance) did change two colours and did not replace two city states that were removed during that whole process they did not make any new city states with previously used combinations and the two colour changes were to combinations of city states that were removed. As such, the only conclusion that fits what has been seen before is that Ragusa has been replaced in this case by Riga, take from that what you will.