Blue channel has been replaced with a new channel named Dhinchaak on DD Free Dish. Looks like Dhinchaak is a Hindi Movies channel.
Below are the technical details of Dhinchaak channel.
Satellite: G-Sat 15 at 93.5° East
Frequency: 11090 MHz
Symbol Rate: 29500
Modulation: QPSK DVB-S
VideoPID: 5015 (MPEG2 Video)
AudioPID: 6015 (MPEG2 Audio)