With that color poppy, I'd pick a yellow rose....or apricot. Although, since the bloom season for Shirley poppies is so short (unless succession planting), I'm not sure it matters all that much :-)

I'd think the color of the wall or fence upon which the climber would be trained would be more important than the short-lived poppies (though I DO love the poppies!). What do you think of Above and Beyond?

@roseseek I literally was just looking at Above and Beyond! I'd whittled down to Above and Beyond or Prairie Harvest. I think that pretty much settles it. My only concern with apricot was if it'd look too Halloweeny (black and orange), but I feel like the grey is purple enough (if that makes sense) that they'd play beautifully together.

Thank you both! I hate getting rid of roses I just bought but both Hattie Burton and Cupcake wound up being way brighter than their images let on. @gardengal48 (PNW Z8/9) can I ask about succession planting? Is that just sowing the same seed in successive rounds after some time elapses, or choosing varieties that'll bloom at different times? I'd definitely like to extend them as long as possible!

Did your Hattie bloom that brighter color, Aaron where you are? Some HMF photos are not accurate either. Climate can make such a big difference in color. I like what you were trying for in the first place. William Lobb would look wonderful, but is a once bloomer. Kim is right that your fence color is more important. It can really be hit or miss trying to get plants to bloom together.

Boy, would Quick Silver look great behind those poppies! It requires no spraying for the dreaded black spot, which if it needed a fungicide as so many high output roses do, the inevitable over spray that hits the poppies' foliage would certainly disfigure it. This will not occur with Quick Silver since no fungicide spray is needed.

The lavender bloom color and this climber's great repeat blooming all summer long are strong assets. Also, its winter hardiness means no winter kill.

If you don't have a fence behind the poppies, just build a 3' high hurdle there to keep Quick Silver's canes closer to the ground so that there's no gap of green growth and flowering behind the poppies. I assume the poppies reach a maximum height of about 16" like most Shirley poppies I know of do.

Moses

Silvers, cream, off-whites, and white would go well with that as you don't want to overwhelm the colors on that poppy. If you do go with something blooming, I'd stay in the more subtle tones and eschew the brighter ones, they'll run right over that color.

Blush colors might work but it would depend on the surroundings and I tend to avoid pinks with colors I would describe as "dioxazine purple with an admix of indigo." To me, this is too cold a tone to mix with a warm one unless you want the surprise contrast, except there I'd simply embrace the paradox and break it with dark, velvet red.

I'd avoid the warmer parts of the spectrum (bright red, red-orange, orange, yellow, and yellow-greens on flower and leaf) unless you really want to accentuate the contrast of cold and warm. If that's your goal, however, then those colors are perfect. That would depend on whether your gardens are built on the concept of harmonious combinations or disharmonic clashes. I tend to use harmonious notes through the garden.

If the blooming period is as short as the poppies I had, then it matters less, Choose whatever looks nice and what you like.

Source: I lifted my paint-stained hands off my canvas to type this. ;-)

You might like to check out some of the threads about amendments and fertilizers (pay attention to posts by StrawChicago as she is extremely helpful!) which can make a big difference to color. Depending on your soil type and what you feed your Hattie Burton, you might be able to get the blooms to look more like your expectations.

"can I ask about succession planting? Is that just sowing the same seed in successive rounds after some time elapses, or choosing varieties that'll bloom at different times?"

That's exactly what it is :-) And typically the time interval is pretty short......a week or two at most.

Unfortunately, that's not going to extend your season too far. Papaver rhoeas is a cool season annual and just peters out in hot weather. Seeding too far into the growing season will produce minimal results....although they could spring to life later as the weather starts to cool in fall.

I think the poppies might be just thing thing to tone down Hattie. The other thing is that nothing looks better as a background for pink roses of all shades than purple or lilac -- along with white.

I also think that bright green or chartreuse foliage (or flowers) such as large cinnamon or ostrich ferns would complement both the rose and the poppies. Gray and bluish foliage is also good, Also touches of something in the same color families only more saturated, such as blackish red "chocolate cosmos", or deep purple clematis 'Warsaw Nike' That way the colors look as though part of a spectrum, rather than standing out so much.

Here and there can be little sparks of brilliant orange, such as the annual tassel flower Irish Poet, keep things from being too gloomy. But not too much.
You might find some color ideas from Helen Fredholm's Norwegian blog (or instagram). She also likes Thalictrum with blue red colors.
http://www.fredholm.no/cottagegarden-blogg

My first thought was Quicksilver too. They would be a beautiful combination I think

My first thought, which others have brought up, is whether the poppy flowering will coincide with the flowering of the rose you select.

My suspicion is that the poppy color is a hard one to coordinate with. I don't know zone 5 roses either, so can't make specific suggestions: this is just thinking about color. I think you need a contrasting color--not one of the gray or violet roses, though 'William Lobb' occurred to me, too--but not a violent contrast, though that may be my own tastes expressing themselves. So, pale cool pink: that old standard 'New Dawn' or its double sport 'Awakening'. Or crimson--dark red leaning to purple--though I don't know whether there are varieties of that color suitable for zone 5. This could give too heavy an effect. I was also thinking of roses that pass from cool pink through shades of mauve, violet, and lilac: There are many Gallicas in this color range, but climbers are scarcer; still, the once-blooming 'Russelliana' comes to mind. White seems too dull, but a white tinged with pink could work. Again, nothing suitable comes to mind.

I must ask, how big a climber are you thinking of? And how big do climbers get in your climate? I live in easygoing zone 8 (some winters, zone 9), so have no experience with this. My thought is that there are some hardy shrub roses, once-flowering, that grow large here and could make good small climbers, if they reach similar dimensions where you live.

I don't know anything about disease resistance in your conditions.

Actually, 'William Lobb' might work, or another once-flowering moss, 'Henri Martin'.

I grow mainly old and older roses, so can't offer suggestions on suitable modern varieties.

How about Distant drums?

If you are okay with a once bloomer there is Blaze, it's a true red and very hardy. I had it in zone 4 in awful heavy clay soil with only a couple hours of sun and it was tip-hardy to -40F with no winter protection. I think that the red would be lovely with the poppies.

I just read on Houzz that Pantone announced their color of the year for 2021, and they named two: grey and yellow. Not that you should plant a yellow rose just because Pantone designates it the color for 2021 but they are two colors that pair well together. Even though it's meant more for fashion and product design, I am hoping this could mean we see more grey roses on the market next year! :D

Great suggestions here! There's also The Alchemist.https://www.helpmefind.com/gardening/l.php?l=2.115.1&tab=1