In both sexes the abdomen is brown with a yellow underside.

Adults have yellow undersides and a patch of orange.

They rolled up tight to display their yellow undersides.

The bill is black and the feet are black with yellow undersides.

Its color may vary from gray to brown with a yellow underside.

Marmosa robinsoni is typically cinnamon brown with a yellow underside.

As an adult, its color is an olive grey-green, with a yellow underside.

It is red in color, with an orange or yellow underside.

It has a yellow underside, occasionally with an orange stripe down its flanks.

They are typically brown, black, or green in color, with a yellow underside.