Navy, yes. Depending on her shade of red, the red might not work, even as accents.
My friend had a chestnut arab mare (she was almost the color of a new copper penny) and she put purple on her. It was adorable and so girly. Makes me sad that I don't particularly care for mares 'cuz I LOVE pink and would love to have it as my tack color...but I'm not doing that to my gelding. Lol
XD looks like a lot of us use purple! I do as well, though in varying shades. It makes the mares look more feminine ^^ All of my tack is black or brown because I drive, but I'm planning on buying new pads for the breastpiece and surcingle soon, and I'm ordering them in purple!
Her halter is 'wine' purple, and I have red, blue, purple, and brown leather leads. Lunge line and whip are purple too.
I agree that red looks horrible on most chestnuts, but my friend rides a mare named Shaniah, and Shaniah's colors are orange with a red browband, brown saddle, and red saddleseat. I think its cute.
And our QH gelding, Buddy- is ridden in all neutral colors except for his bright red reins! I find red to be a very attractive ACCENT color on chestnuts, so you might do well with navy and red!
But then again...Puddin' has a red headstall (she had a mahogany stained brown headstall but it snapped) and she doesn't look all that bad.
I know red is definitely out for chestnuts, but I was thinking how about navy as a main colour, with sort of red lining.
Like a navy halter and a red lead rope. A navy saddle blanket with red piping - not quite around the outside but about 2cm/inch in. Navy boots with red straps.
What do you think?
I'm fairly sure CanHeStar has navy with red accents for her horse, and it looks really good. I don't have any pictures, but I had Barcoo in pale purple for a while, and Joe used to be green and Toby's always been blue. They all look pretty good in my opinion. I personally like black tack on chestnuts more.