Dark Blue Nail Polish

LONDONTOWN's dark blue nail polish collection is formulated with Florium Complex to help nourish nails while delivering rich, saturated color. Blue Diamond is a rich sapphire blue; Buckingham Blue is a striking, deep blue with a polished, classic edge; Black Thorn is a moody, midnight shade that leans closer to deep purple; and Midnight Kiss is a deep, moody navy blue. From true sapphire to moodier, almost-purple tones, the collection offers real depth within the dark blue color family.

Dark blue shades can vary by undertone, making your skin's undertone a helpful starting point. Blue Diamond's sapphire and Midnight Kiss's navy tend to look especially sharp against cooler or fairer undertones. Buckingham Blue can complement warmer or deeper undertones, as its rich depth pairs well with warmth in the skin. If you're unsure of your undertone, blue-toned veins on the wrist can indicate cooler undertones, while greener-looking veins can suggest warmer undertones. You can also swatch two shades side by side in natural light before committing to a full manicure. Dark blue is a versatile, polished color across skin tones, so ultimately it's about choosing the shade that feels most like you.

LONDONTOWN's dark blue nail polish collection is built on our Color + Care philosophy: it looks like color and performs like care, so a deep, dramatic shade doesn't mean sacrificing nail care. Every shade, including Blue Diamond and Black Thorn, is infused with our proprietary Florium Complex, a botanical blend that helps nourish and strengthen nails with every wear. The collection also offers real variety within one color family, spanning true sapphire, classic deep blue, navy, and near-purple midnight tones. It's a dark blue collection designed to deliver both rich color and care.

LONDONTOWN's Color + Care philosophy carries through every dark blue nail polish shade in the collection, including Blue Diamond and Buckingham Blue. Every bottle is infused with our proprietary Florium Complex, a botanical blend that helps nourish and strengthen nails during and after wear. Innovative pigment technology allows for a smooth, creamy glide and vibrant, high-resolution color payoff, while our Pro-Contour Brush is designed to make at-home manicures easier by providing greater control with fewer strokes. It's a formula philosophy built around consistency, delivering the same care and performance standards regardless of color depth.

Yes. Dark blue nail polish shades like Blue Diamond and Midnight Kiss meet the same clean formulation standard as the rest of the LONDONTOWN lineup. They are vegan and cruelty-free with PETA certification, 21+ Free, and paraben-free.

How long dark blue nail polish lasts depends largely on nail prep, application, and daily wear. Start with a clean, oil-free nail bed by using Strengthening Lacquer Remover before applying color to help create a clean surface. Follow with a base coat and apply two thin coats of color rather than one thick coat, as thinner layers set more evenly and can be less prone to chipping at the edges. Finish with a top coat to help seal in color and shine, and give the polish about 20 minutes to an hour before submerging your hands in water. Shades like Blue Diamond and Buckingham Blue are formulated to maintain their rich depth and resist chipping when properly applied and maintained.

For a streak-free finish with saturated dark blue shades, focus on proper prep and thin, even layers. Wipe away lotion, oil, and debris with Strengthening Lacquer Remover, then apply a base coat like Nail Hardener & Base Coat to create a smooth canvas. Apply the first coat in three main strokes: one down the center and one on each side. Let the first coat set for 2–3 minutes before applying a second thin coat for opacity and depth. Clean up any stray polish near the cuticle with a small brush dipped in remover, since deep shades like Black Thorn can make imperfections more noticeable. Finish with a top coat for shine and added chip resistance, and cap the free edge of the nail to help protect the manicure. Two thin coats will typically create a smoother, more even result than one thick coat, especially with a deep shade like Midnight Kiss.