"אני אוכל עוגה צבעונית."

Translation: I am eating a colorful cake.

[Baloupupu]

The "a" is still missing for me. Eating a colourful cake.

[whyhoffman]

"I'm eating colorful cake" should be accepted as well.

[Larry824711]

They might have fixed that. I just put in "I am eating colorful cake" and it was accepted as correct.

[Daiana.215]

Ani ochel ugah tzivonit (tzvionit?)

[AzIgaziZsoozsy]

Tzivoni/t - צִבְעוֹנִי/ת
(and ochelet if you are talking about yourself and you are feminine ;) )

[DanFendel]

I agree that this is legitimate English.

[Annemarie0719]

I guess it could mean that what is being eaten is colorful cake chunks/bits etc and not the entire cake

[Tasaladden]

Spot on.

[RaphaelCoh1]

The "a" seems missing.

[ElinaSpekt]

I am eating a colorful pie - what's wrong?

[YardenNB]

Assuming the continuous tense is OK, and the problem is in "pie" vs, "cake", I think that "pie" is a borderline translation to עוגה, while "cake" is the straight-and-narrow translation.