555
The Thai pronunciation of number 5 is ‘HA’, so ‘555’ means LOL (laughing out loud: HA-HA-HA.) 555

Unlike the rest of the world, where taxis are usually in a single color (ie. NYC yellow cabs), Thai taxis have several fun candy-like colors and all the color has its meaning. The single-color such as hot pink, vibrant blue and orange are company taxis, personal taxis in cooperation or alliance and rental company taxis. The yellow–green taxis are the only type of taxis that are owned by individuals