CROCODILIA vs ONYX: Choosing a Dark Nail Polish Base
By Death Valley Nails | Published: 2026-11-01
Category: Comparisons
CROCODILIA and ONYX both build opaque dark bases, but one leans compost green and the other carbon black. Here is how to choose between them.
Quick answer
Choose ONYX if you want a true carbon black base that stays neutral under any top coat. Choose CROCODILIA if you want a deep green that reads dark but shows its compost-green character in daylight. Both are 10-free, vegan, and cruelty-free, so the decision comes down to hue and how you plan to wear it.
Hue is the real dividing line
The catalog describes CROCODILIA as compost green and ONYX as carbon black. That difference matters most when you layer effects: a black base keeps flakies, shimmers, or sheer toppers looking cool and neutral, while a green base shifts them toward olive or forest tones. If you want the topper to be the star, ONYX is the safer canvas; if you want the base to contribute color, CROCODILIA does more of the work.
Opacity and application are shared, not differentiators
Both shades recommend a base coat, two to three coats of polish, and a top coat. Neither product page lists a different opacity or dry-time claim, so do not expect one to be a one-coat polish while the other needs three. The practical difference is that a deep green can look patchy if you stop at two thin coats, while black tends to hide unevenness sooner. Build both in thin layers rather than loading the brush.
The cap is a shared extra, not a reason to pick one
Both CROCODILIA and ONYX ship with a removable handmade decorative bronze cap over the standard black matte cap. That is a presentation detail, not a wear difference. If you are buying for a salon or a gift and want a consistent look, both deliver it; if you prefer a plain cap, the store notes you can forego bronze caps on your order.
Trade-offs to weigh before you choose
- Color payoff vs. neutrality: CROCODILIA adds a visible green cast that can tint sheer toppers; ONYX stays neutral and lets other colors read as intended. If you change toppers often, a neutral base saves you from surprise color shifts.
- Forgiveness during application: A carbon black like ONYX tends to mask minor streaks at two coats, while a deep green like CROCODILIA may need the full three thin coats for even coverage. Budget an extra minute per hand if you choose the green.
- Wardrobe and occasion match: ONYX reads formal and sharp with cool-toned outfits; CROCODILIA reads earthy and pairs more naturally with olive, rust, and cream. Pick the shade that already matches the clothes you reach for most.
Product facts at a glance
- CROCODILIA (Wholesale): Compost green shade, 10-free, vegan, cruelty-free, and nontoxic. Gives you a dark green base with a cleaner formula story, so it suits shoppers who read ingredient lists as closely as color.
CROCODILIA (Wholesale) - ONYX (Wholesale): Carbon black shade, 10-free, vegan, cruelty-free, and nontoxic. Provides a neutral black base for layering, so toppers and art stay true to their own color.
ONYX (Wholesale)
Who each shade is for
Best for
- Shoppers who want a true black base for nail art and layering
- Anyone building a neutral dark manicure for formal or evening wear
- Salons that need a dependable black for French tips and outlines
Not for
- Shoppers who want a visible green tint in their dark polish
- Anyone looking for a one-coat opaque formula, since both recommend two to three coats
- Buyers who need a specific finish or dry-time claim that is not listed on the product page
