Read the poem:

Colors

By Shell Silverstein

My skin is kind of sort of brownish

Pinkish yellowish white.

My eyes are greyish blueish green,

But I'm told they look orange in the night.

My hair is reddish blondish brown,

But it's silver when it's wet.

And all the colors I am inside

Have not been invented yet.

The suffix -ish added to the words in the poem suggests an idea of: