Colors

Not me
A few verbs in Portuguese don’t have a form for eu. There’s no real reason for it — it’s just not there. One example of this is colorir.
sujeitoverbo (colorir)
Eu
I
???
Você
You
colore o livro.
color the book.
Ele / Ela
He / She
colore o livro.
colors the book.
Nós
We
colorimos o livro.
color the book.
Vocês / Eles / Elas
You all / They / They
colorem o livro.
color the book.
So you can’t ever say I color in Portuguese! You’ll have to use a different form that means I’m coloring.
The sounds of R
There are two ways of saying r in Portuguese.
cachorro
cachorro, carro
Double r sounds like h, as in hot.
roxo
roxo, rosa
When r is at the start of a word, it also sounds like h, as in hot.
amarelo
amarelo, colorido
A single r sounds like a light d, like in ready.