as u can see it's a very simple guide eve.
Further information below:
the flesh tone at the corner of the eyes is up to you. may be normal pink to whatever skin color you have chosen for your beast.
nly Cat's eye variation comes in 2 limited eye colors. either gold or any shade of gold . And any shade of red.
Other eyes except blind eyes and Cat's eye can come in two different colors.( as shown in two-tone eye color sample)
Otherwise single tone eye colors are very common and tend to have more obvious glows.
And if you decide to make your beasts eyes totally white or gray they may look like blind eyes but they can glow unlike the blind eyes.