What color tie is appropriate for a funeral?

black is fine. Or anything pretty much dark—like the blue one. I suppose stripes could be ok if they are suitably somber, but I’d stay away from them in general.

Dark suit – black tie. Dark blue suit, dark blue tie. I’m colourblind and this is a no brainer. Sorry, just saying.

However, may I extend my condolences on the passing of your grandfather. May you know of no further sorrow.

Dark blue will be fine. Small stripes will be fine. So sorry for your loss.

You don’t necessarily have to follow any rules. It depends on the personality of your grandfather and what he would appreciate. Maybe a tie in his favorite color, whatever that might be.
When my grandpa died, grandma wore a red dress to his funeral because he always loved her in red. It was a sweet statement of her love for him.
I am also very sorry for your loss.

I too extend my condolences on your grandfather’s death.

Honor him; if he would have laughed at reindeer antlers and a clown nose, wear them.

Honor your grandfather! If he loved baseball, wear a baseball tie. Better yet, wear one of his ties.

My condolences on your loss, particularly in the holiday season—I know that can be hard if you were close. I agree with the folks just above me, wear something that would honor him. If he was straight-laced, stay conservative with color and pattern.

My condolences on your loss. Dark suit, any tie in muted colors and small pattern will be fine. don’t forget to shine your shoes.

The suitably attired gentleman wears a black suit, white shirt and black tie to a funeral.

Sorry to hear about your grandfather.

Any kind of tie would be fine, especially for a family funeral. I’m of the opinion that if it’s a funeral for someone you were close to, you should wear whatever feels right. Similar to what @Blueroses said, my sister wore a bright pink blouse to our grandmother’s funeral, because Nana loved that colour.

A dark tie would be best.

Sorry for your loss.

A dark tie is the safe choice, but I like @gailcalled‘s advice.