[MeanWestTexan]

I wouldn't bet a marriage, either -- but a DNA test might be in order.

That said, the only way a brown-eyed child is possible is a parent is really a Hazel that is "passing" for blue.

[AnAmericanMother]

You also have gray, blue-gray, and various shades of green in addition to true hazel. And the color expression is highly variable. My irises are a dark hazel but with a pale green center, my husband's pale blue-gray, and my daughter's eyes appear to be a mix of the two, appearing brown in some lights and blue in others. She kids that her eyes are color-coordinated to what she's wearing.

Even with all Siamese cats' eyes being nominally blue, and the thousands of generations we've had to fix the eye color, we still have to watch out for and breed out "funny" eye colors . . . I've seen cats with a pale washed out bluish gray eye color, and others so dark as to be almost indigo. The "ideal" under the standard is "deep vivid blue" for all coat colors, but it still varies. Generally, it appears that the gene for the dilute coat color also affects the eye color and washes it out to some extent, so that your Blue Point Siamese, for example, will have a darker blue eye than the Lilac Points. All the Blues have lighter eyes than the Seals, too, so I'm pretty sure that coat color has an effect.