I don't have any pictures myself, but I'm glad to see what you're doing with these colors! I added sienna sunset this past summer and it's nice enough but I need to pair it with something that will make it show and not just let it get lost among the brighter colors. Thanks!
I do like a green flower. It's got to be a little different than the foliage color to at least show off a bit, but they always make me happy... Even more so when they're cut and brought inside.
White flowers that have brown in them, like roses where the center is no longer yellow, tHat might be the only flower shade I don't like. It makes me feel like I need to dead head even when the flower is still nice.

I yanked agastache blue fortune because it was too gray for me. Black adder and blue boa are much more to my liking. I considered joe pye weed for the butterfly garden and it didn't even come home from the nursery -- too gray. So evidently I don't do grays.
My pandora's box is cream & purple, it looks like a scaled down version of moonlight masquerade. It can stay.

Artists have a saying--You have to have the dark to show the light. This saying can be reversed when it comes to planting flowers. One of my favorite dark flowers is Cappuccino Rudbeckia. It has a lovely large daisy like flower with a chocolate button and dark burgundy brown petals that are gold tipped. On it's own it barely shows up in the flower bed but paired with bright yellow Correopsis or some other bright white or yellow flower it really pops.

Other dark flowers I don't like at all. They seem like misfits or an experiment gone wrong. Petunias pansies and roses were never meant to be black. Some may like them for the oddity of it all but they will never have a place in my garden

I think dark flowers/plants make all the difference in a border. I once looked at 2 borders wondering why one looked so much better than the other. The answer was the presence of dark colors providing "shadows" to the brighter plants.

-kato, you make an excellent point about green colors. I had 'Pretty Much Picasso' Petunia a few years ago and found that to be a problem. The green edges of the petals were so close in color to the foliage that you didn't get even notice the edging until up-close.

-Cecily, never thought about it, but I guess JPW has that overcast grey-ish tone to it. I've always called it "dusty" pink/rose. I personally like that color...in fall at least. Not sure it would work well with the pastels or jewel tones of spring though!

-dow, true! And as callirhoe mentioned, dark colors give depth and prospective to a garden that would be sorely missed otherwise.

I'm not sure why, but I find black and dark colored flowers fascinating. They are probably the most difficult to use design wise in the garden- I'll admit that!

I started some Hellebore seed from 'Black Beauty', but it turned out to be more rose colored. Bummer! I'll just have to break down and buy one this year.

I started some Arisaema triphyllum a few years ago- hopefully a couple have black/dark streaks.
CMK

Dark purple African violet with dark green leaves. A lighter leaf, a different shade of purple but one I have is not my idea of beeeyouteeful. I intend to gift it somewhere and have the space for all the lovely vibrant violets I own or plan to own.

There are few colours I dislike...although there are a myriad of combinations which I find appalling. Stripes - have never done much for me, particularly in highly artificial forms such as high centred hybrid tea roses - the awful, awful Simsalabim is the epitome of horror. Salpiglossis is an example of a luridly diseased looking plant - although I can just about tolerate the Kew Blue variety. Variegation is not terribly appealing to me but does depend on context. The hideous farfugium with yellow blobs on a green base is quite odious and I also really dislike pulmonarias with spotted foliage.
I don't care for beige or parchment tones...and have never successfully placed the coffee coloured roses...although I do love the terracotta and russet tones. I do grow a rather bizarre delphinium which has brown/grey and slate=y blue colouration (D.requiennii) but mainly because it has a sculptural form which mitigates the odd colours. As a rule, I prefer saturated colours with minor blending - picotees always look too artificial although I grow a charming little semi-wild rose - Hebe's Lip which has the faintest tints of crimson staining the petal edges.
But yep, eupatoriums have never really floated my boat but I will grow plants for other reason's than pure aesthetics.

There is a particular shade of salmon pink which makes me feel slightly ill - that geranium 'Wargrave Pink' for example or a couple of the hesperanthus/schizostlis and hesperaloes - grim.

Orange, to me, is an ugly color for a flower. I'm drawn to clear, primary colors in flowers - red, white, yellow, blue.

I don't care for pink flowers, which seems really odd because I like pink. I'm even wearing a pink pullover right now! But I don't like pink flowers.

Campanula, you have a way with words; made me laugh.

I have trouble with some of the two-toned daylilies since something that's tannish-orange with a purple ring seem to be difficult to use with anything else.

In general, I prefer bright clear colors, but there aren't many that I would consider ugly.

Dear Campanula & Little Bug5,

With your plethora of ideas, you might just be the two to help:
This isn't about hating the colour, quite the opposite, but I have an apricot coloured rose called All The Rage & the thing is I love it. It bloomed from spring till frost and it is positively luminescent in the garden. My problem is this: I have a hard time finding complementary colours to place in its vicinity, except white and pale yellow (like in the going bananas lily) because of that yellow in the middle.

Let your colour opinions fly!
Thanks,
Dina

The insipid color of the flowers of Periploca graeca, the silk vine. Not only is it's odd little flowers insignificant to look at, it has an unusual fragrance, being kind here. Why do I grow it, I guess its because I'm drawn to the unusual, I do have to say the foliage isn't too shabby, maybe that's why it's still around.
For years the only colors I liked were the cool colors, a light lemon yellow was tolerated and of course white but the last few years I've been drawn to some of the warmer colors, even orange which I used to hate with a passion, I guess I'm mellowing in my old age LOL.
I'm finding any color situated in the right setting can be stunning.
Annette

Mmm, I shocked even myself last summer with an outrageous combo of pink and orange - a gaudy, but continually blooming mallow - anisodontea El Royo (I think) and a very cheerful geum, Totally Tangerine and a couple of small, but very orange-ey daylilies. A libertia peregrinans and a bronzey, but fairly generic heuchera. several shrubby salvias....hellfire crocosmia (and citronella?), another very red hemerocallis and my rose, mutabilis....I like these hot colours with deeper plums/bronzes (think I might stick a chocolate cosmos in the mix this year). Enough slashes of green to keep some balance but, yep, I really liked that part of my flower bed..

Yeah, am completely in agreement with Annette (not about oranges, obvs,), but that any colour can be fabulous.

Suum quique - Latin for "To Each His Own' (Okay, be impressed: I learned that back in 8th grade, C. 1963).

I don't like orange flowers but don't put down other gardeners who do. My garden doesn't need to please anyone except me... and it does.

I like blue. Always have, I'm guessing I always will. Blue doesn't always lend itself to the garden but I appreciate when it does. Bronze colors don't interest me but that's a personal preference since it doesn't fit in with my vision of my garden beds. Can't honestly say the color offends me.

Black flowers hold no attraction in my mind. I acknowledge they may be dramatic to some and offer some contrast I can't see. I don't apologize for not finding them attractive or compelling.

I may not agree that any flower color can be fabulous, the originator must take into account that observers may find the color either offensive or unimpressive.