Pick a colour, any colour – chances are OPI has it, or something close. The US- based company is known for its wide range of nail lacquers (all DBP-, toluene-, and formaldehyde-free) with unique hues & whimsical names often inspired by places. To wit: Dutch-Ya Just Love OPI?—a deep, opaque violet with a subtle red-&-gold shimmer—is part of a special Holland collection.