No the eye color is fine. The eye color doesn't matter.
Ash dragons are small wingless dragons about the size of a medium sized dog. They have a mane of fur that stretches from their forehead to the base of their tail. That have tough plates on their chest to the base of their tail. They live in all part of the world their thick mane providing warmth in the colder climates. Scientists have discovered that Ash Dragon coloring usually is a variation of shade that their flame is, or a white/grey/black design with bits of their flame color in the design. Most ash dragons are strictly the color of their flame but sometimes a rare dragon will come along with a blue flame and purple highlights in their design or a red/orange flame with yellow in it's design. There is no known connection between the color of a flame and eye color.