It's a thought that came to me. If Angela and Wheatley are related and Angela has pink hair but dyes it blonde, what if Wheatley should have blue hair, and he just dyes it orange? 

Dialogue for top frames are above the picture and dialogue for bottom frames are below the picture.

Wheatley has Newton and Romeo over by his house.

Wheatley: "Hey guys, I'm going to wash my hair so could you guys please wait while I'm busy because I can't do it with someone watching me. I might take a while so if I'm not done by the time you guys have to leave then just yell that you're leaving and say bye." Goes into the bathroom

Newton: "Hey Romeo, I think somethings fishey here. Wheatley's usually almost always washing his hair at least every few days. I know it's a normal routine but he sometimes answers the door while wearing either a towel on his head or a hat that completely hides his hair."

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Romeo: Newton Relax, nothing is strange with him, stop being rediculously paranoid. Just because the Wheatley on OUR team ended up being your brother-in-law, doesn't mean there are any more surprises.

 Newton: Well I'm going to go ask him either way. Why don't you come with me? You know as a witness, and if you were right, you can be happy about it.

Romeo: Sigh Fine, maybe I'll have a FACINATING story to tell Aneesah when I get home.

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Romeo: Unless it's one of the less moronic things Wheatley does in life, looking after his hair.

Newton: Meh.

Newton: Uh...Wheatley?

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Wheatley: Aaaah! Guy what the heck!

Both: ...

Romeo: ...Okay...I did NOT see that coming...

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To explain the comic, washing his hair was just Wheatley's excuse to clean the old dye and replace it with new dye. So no one figures he has blue hair. YOU MORON! YOU COULD JUST ADD NEW DYE ONTO THE OLD ONES! Angela must have been the smart twin.