Emulator

Game Name?
Sonic Colors

Game ID?
SNCE8P

What's the problem? Describe what went wrong in few words.
Graphics for the title screen, file select screen, world map (i.e 2D overlays) appear invisible.

What did you expect to happen instead?
Not that.

What steps will reproduce the problem?

1. Start the game
2. Get to the title screen at least (screen will appear blank confirming your input method (GC/Wii Remote, etc); just press A a couple times)

Dolphin 3.5 and 3.5-367 are old versions of Dolphin that have
known issues and bugs, so don't report issues about them and test the
latest Dolphin version first.
Which versions of Dolphin did you test on?
Introduced in version 4.0-3748 and is present in latest (which is as of now 3771).

Does using an older version of Dolphin solve your issue? If yes, which
versions of Dolphin used to work?
Not present in 4.0-3746.

What are your PC specifications? (including, but not limited to: Operating
System, CPU and GPU)
Windows 8.1 64-bit, AMD FX-6300, AMD R7 265

Is there any other relevant information? (e.g. logs, screenshots,
configuration files)
Oddly enough, the issue occurs on the OpenGL backend in the build where Direct3D had no problems (4.0-3746).