It varies based on the edition of the game. Here are 4 of the popular versions, the US and UK originals, the Here and Now version, and the World version:
1) Original US :
Mediterranean Ave + Baltic Place (violet)
Oriental Ave. + Vermont Ave. + Connecticut Ave. (light blue)
St. Charles Ave + States Ave. + Virginia Ave. (maroon)
St. James Place + Tennessee Ave. + New York Ave. (orange)
Kentucky Ave. + Indiana Ave. + Illinois Ave. (red)
Atlantic Ave. + Ventnor Ave. + Marvin Gardens (yellow)
Pacific Ave. + North Carolina Ave. + Pennsylvania Ave. (green)
Park Place + Boardwalk (medium blue)
Utilities : Electric Company + Water Works
Railroads : Reading + Pennsylvania + B&O + Short Line
2) Original UK :
Old Kent Road + Whitechapel Road (brown)
The Angel, Islington + Euston Road + Pentonville Road (cyan)
Pall Mall + Whitehall + Northumberland Avenue (purple)
Bow Street + Marlborough Street + Vine Street (orange)
Strand + Fleet Street + Trafalgar Square (red)
Leicester Square + Coventry Street + Piccadilly (yellow)
Regent Street + Oxford Street + Bond Street (green)
Park Lane + Mayfair (blue)
Utilities: Electric Company + Water Works
Railways: Kings Cross Station + Marylebone Station + Fenchurch Street Station + Liverpool Street Station
3) Monopoly Here and Now (2006) and Electronic Banking (2008):
Jacobs Field + Texas Stadium (violet)
Grand Ole Opry + Gateway Arch + Mall of America (light blue)
Centennial Olympic Park + Red Rocks Amphitheatre + Liberty Bell (maroon)
South Beach + Johnson Space Center + Pioneer Square (orange)
Camelback Mountains + Waikiki Beach + Disney World (red)
French Quarter + Hollywood + Golden Gate Bridge (yellow)
Las Vegas Blvd. + Wrigley Field + the White House (green)
Fenway Park + Times Square (medium blue)
Utilities: Internet Service + Cell Phone Service
Airports : ORD, JFK, ATL, LAX
4) World Edition (2008):
Gdynia + Taipei (brown)
Tokyo + Barcelona + Athens (light blue)
Istanbul + Kiev + Toronto (maroon/purple)
Rome + Shanghai + Vancouver (orange)
Sydney + New York + London (red)
Beijing + Hong Kong + Jerusalem (yellow)
Paris + Belgrade + Cape Town (green)
Riga + Montreal (blue)
Utilities : Solar Energy + Wind Energy
Monopolies: Rail, Air, Cruise, Space
The blue monopoly properties are Park Place and Boardwalk.
oriental avenue, conneticut avenue and vermont avenue are the light blue propeties in monopoly
mayfar and parklane
There are two blue spots in monopoly. They are park place and boardwalk. In other verison, they are known as the most expensive properties.
free parking
I don't know but I think it is light blue. I don't think so I think it is the orange properties St. James, Tennessee and New York aves
In Monopoly, the most valuable and strategically important properties are the dark blue properties (Park Place and Boardwalk), followed by the green properties (Pacific Avenue, North Carolina Avenue, and Pennsylvania Avenue). These properties have the highest rent and can generate the most income for players.
Acquire a full set of properties as quickly as possible and build up houses on them until you have a hotel. Just a few landings on this built up property will bring in tons of cash. Aim towards the green/blue properties - those bring in the most money. Don't bother building hotels on the light-blue and brown properties.
Blue for Boardwalk and Park Place.
RAILROADS! The most important properties to EVER buy in Monopoly! Second, buy all of the light blue (cyan) properties that are near the beginning of the board. Third, buy the brown properties, the very first ones on the board. Lastly, buy the orange properties that are near free parking. Railroads bring in money like crazy, the brown and blue properties have CHEAP houses AND hotels. The orange properties aren't that expensive either, but are landed on pretty frequently. MAKE SURE TO PUT HOTELS/ AND OR HOUSES ON ALL OF THESE,(except railroads, duh!) VERY, VERY EARLY IN THE GAME OR AS SOON AS YOU CAN!
brown, light blue , pink,orange,red, yellow,green and dark blue < least valuable ----------------- most valuable>
Blue light can weaken the bonding strength of glue by breaking down the adhesive properties of the glue molecules.