Colouring Zone is a recurring feature in the Sonic the Comic Online editions of Sonic the Poster Mag and one main edition. It appeared in three of the four issues, bypassing only Sonic the Poster Mag 2006. The feature presented black and white copies of pin-ups and strips, allowing Boomers to add their own colours. Due to popular demand, it returned in Issue 257.

Editions

Sonic the Poster Mag 2004

• Cover of Issue 228 by Rich Morgan
• Page 3 of Issue 233's Fate of the Special Zone by Thalia Evans
• Page 1 of Issue 230's Horror in the Haunted Hill Zone (Part 1) by Mike Corker

Sonic the Poster Mag 2005

• Pages 2 and 3 of Issue 234's Journey to the Crossroads (Part 1) by Adamis
• Page 7 of Issue 237's Vendettas

Sonic the Poster Mag 2007

• Cover of Sonic the Poster Mag 2006 by Bakasam
• Chaotix Crew pin-up by Adamis
• Cover of Sonic the Poster Mag 2004 by Chris G

Issue 257

• Cover of Issue 254
• Page 5 of Issue 255's Many Happy Returns
• Page 5 of Issue 256's Master of All I Survey
• Group pin-up by Adamis and Matt Dittmer
• Fabian Vane panel from The Battle For Mobius

In this edition, Megadroid encouraged Boomers to colour the drawings and send them in, planning on posting his favourites in the comic.