Boeing 737-700 (N230WN)

Southwest Airlines (WN) N230WN B737-7H4 [cn34592] in Colorado One livery
Fort Lauderdale (FLL). Southwest Airlines flight WN3899 taxis to the gate after arrival from Chicago Midway (MDW). The aircraft was painted in 2012 with this special ‘Colorado One’ livery based on the Colorado state flag. Since 1988 Southwest Airlines have painted selected aircraft in special liveries reflecting the images of principal US states SWA serves, destination partners or aspects of the SWA’s history. This airframe is also the 5,000th Boeing 737 built.
Taken from Terminal 1 car park roof level

2018 04 07
https://alphayankee.smugmug.com/Airlines-and-Airliners-Portfolio/Airlines/AmericasAirlines/Southwest-Airlines-WN