Depends. If it’s "This might be a great color on you, " maybe. If it’s, “I’ve always had a thing for blondes and I want you to be one too,” then eff off!
ETA: I would also consider going back to my natural color if he asked, but only if my natural color wasn’t too heinous. Fortunately mine isn’t.
If it’s a color I could live with, sure, why not.
Blonde? Nope. I’d sit down down and explain the joys (and work) of dyeing dark hair blonde, and then explain how very bad I’d look blonde.
Sure to that too. Why not?
Sure, I’d go for it. I doubt I’d change my color permanently, unless the new color looked fabulous, but if my husband said something like, “I’ve always wanted to be with a brunette,” I’d try it out.
Maybe if you had spelled it differently she would have been more receptive to the idea? 
I don’t dye my hair because I don’t like the cost, the damage to my hair, and the upkeep so no, I probably wouldn’t if he asked.
I do like the “You first” answer to the question.
I would, but he’d have to put up the cash for a good dye job and all the subsequent maintenance. That’s practically a second job, since I’m not going the Miss Clairol route. And he’d probably need to give me a better reason than just whim - I’ll wear a wig if he wants to fantasize about redheads. I like my gray hairs.
My hubby and I have been together almost 25 years, and in the intervening time, have made all kinds of accommodations for one another.
In light of our long history, in light of the fact I know he’s not generally controlling or potentially abusive, if he told me, “baby, I’d love it if you tried going blond”, I’d do it for him.
We accommodate one another. It’s one of those factors that’s kept us together this long. Likewise, if I told him “baby, I’d love it if you tried getting a crew-cut”, he’d do it. Just because I asked him to.
It’s hard for me to imagine my husband actually noticing my hair or its color, but if he did and asked me to change it, I probably wouldn’t. I say that because I probably wouldn’t like his suggestion, but if it were a color I were considering anyway, I might.
I’ve been coloring my hair since I started getting really gray about 15 years ago.
Heh, heh, heh…
When I first began dating my ex…twenty-some years ago…my hair was a rainbow-colored punk style. He never said anything negative about it, but I noticed that his head turned whenever he saw a woman with a head of long hair in a color normally found on human beings.
You guessed it…pretty soon, I began to let my hair grow (took a long time to grow it out even) and started to go back to my natural color…only my natural color was getting to have a lot of gray in it.
I’ve been dying it something akin to what was my once-natural light reddish brown / strawberry blonde ever since (but I actually do like it).
He never asked, but if he had, I likely would have.
In the past, I’ve dyed my dark brown with grey hair a dark auburn. My husband was against it…until he got used to seeing me in that shade. Nowadays, my scalp is breaking out, so I don’t put dye or any other styling products on my hair. However, he still wistfully remarks that I was right, I DID look good with auburn hair, and that if my scalp clears up, he’d like to see me in it again. I wish that I could get it dyed again, too. I go to a local beauty school, and it’s really not that expensive, though it is time consuming.