Games : Minecraft: How To Make Two Lines Coloured When Writing A Sign

I am trying to make both, Text 2 and Text 3 lines coloured, however I am failing.

This is the base command that works: /setblock ~ ~1 ~ minecraft:wall_sign 3 replace { Text2:"{ text:\"Teleport To Shop\",\"color\":\"blue\", clickEvent:{ action:run_command, value:\"/say Clicked.\" } }"}

This is the command that I am trying to use that doesn't work: /setblock ~ ~1 ~ minecraft:wall_sign 3 replace { Text2:"{ text:\"Teleport To\",\"color\":\"blue\", Text3:"Shop\",\"color\":\"blue\", clickEvent:{ action:run_command, value:\"/say Clicked.\" } }"}

The first command has the word, "Shop," on the second line, but I want it to be on the third with the colour blue. Please don't mind what the Run_Command value is.

I am extremely new to JSON, and don't really know what I am doing. I'm just curious. If you could also briefly explain why the correct answer, is correct, that would be great.