Casual dresses can have long sleeves, too
It's a genuinely different option from the solid-colour dresses, worth considering if you want more visual interest without introducing a second colour into the palette

DETAILS Crafted from washable, 100% mulberry silk 19mm fabric weight for a premium drape and hand-feel Satin finish Adjustable straps for easy fit Bias cut This material is certified by Standard 100 OEKO-TEX certificate SH050 127759, which ensures that no hazardous substances are present Shenzhen Guangdong, China and Vietnam SIZE & FIT Midi length: 46" in size small Model is 5'7" and wearing a size small in aqua pearl Model is 5'8" and wearing a size small in rose powder and dogwood Model is 5'9" and wearing a size small in navy, ruby noir, wine tasting, celestial, grey lilac, and moss green Model is 5'10" and wearing a size small in bouquet symphony, mocha midi dot, and moonstone blue heirloom floral Model is 5'10" and wearing a size extra large in salsa Model is 5'11" and wearing a size small in morel grey, tiny dot black/white, paprika red, and black vintage pink petite floral CARE Hand wash or machine wash cold in delicate or gentle cycle with similar colors

It was very sweet, very savory, and very aromatic, which is not what I want from a mild Thousand Island dressing
Luckily, there are many options available for moms to select, and that's especially true if you're looking for a modest mother-of-the-bride or -groom dress that is classic, elegant, and timeless