RefectoCil Eyebrow & Eyelash Tint – Deep Blue No. 2.1 | 15 mL

RefectoCil Deep Blue No. 2.1 Eyebrow & Eyelash Tint is an intensive, cool dark-blue tint designed to create striking blue definition on naturally light lashes and brows.

Especially suited to light-blonde and blonde lashes, Deep Blue enhances lighter hair with a visible blue tone and beautifully complements blue eyes, blue eye makeup and creative colour looks. RefectoCil notes that the blue effect is most noticeable on lighter hair and may not be visible on very dark lashes.

The finished colour is waterproof and smudge-resistant, with results lasting for up to 6 weeks. Each 15 mL tube provides approximately 30 applications.

Why You’ll Love It

• Intensive, cool deep-blue colour
• Especially suited to light-blonde and blonde lashes
• Beautiful complement to blue eyes
• Ideal for creative blue eye-makeup looks
• Creates defined, darker-looking lashes
• Waterproof and smudge-resistant
• Results last up to 6 weeks
• Approximately 30 applications per 15 mL tube
• Can be mixed with RefectoCil Red to create violet tones
• Professional-quality brow and lash tint

Who Is Deep Blue No. 2.1 Best For?

Deep Blue is primarily designed for naturally light lashes.

RefectoCil recommends the shade especially for blonde and light-blonde hair, where the cool blue colour can become visible and create a distinctive result. It’s also an interesting choice for people with blue eyes who want their lash colour to complement and emphasize their eye colour.

Important: Deep Blue generally won’t create a noticeable blue result on naturally very dark hair. For dark lashes, Blue Black No. 2 is the better choice when you want a black result with blue dimension.

Deep Blue vs. Blue Black

This comparison absolutely belongs on the page.

Deep Blue No. 2.1
A true, cool dark-blue tint. Best for naturally light-blonde to blonde lashes when you want the blue itself to be visible.

Blue Black No. 2
A black tint with a subtle blue shimmer. It creates a much darker result with additional depth and shine and works better on naturally darker lashes.

Simple rule:

Want visible blue on light lashes → Deep Blue

Want deep black with blue dimension → Blue Black

Create Custom Violet Tones

Deep Blue can also be used for custom colour mixing.

RefectoCil specifically recommends combining Deep Blue + Red No. 4.1 to create purple/violet tones. Deep Blue can also be combined with darker RefectoCil shades when additional colour depth is desired.

What You Need

Developer is required and sold separately.

RefectoCil Deep Blue No. 2.1 must be mixed with compatible RefectoCil Oxidant 3% Developer before application.

RefectoCil Oxidant 3% Liquid – fluid developer that’s easy to measure by drops.

RefectoCil Oxidant 3% Cream – thicker developer for a creamier mixing consistency.

Frequently Asked Questions

What colour is RefectoCil Deep Blue No. 2.1?
It’s an intensive, cool dark-blue tint designed to produce a visible blue result, particularly on naturally light hair.

Who is RefectoCil Deep Blue best for?
RefectoCil particularly recommends it for light-blonde and blonde lashes.

Will Deep Blue work on dark eyelashes?
The manufacturer/supplier guidance says the blue effect isn’t noticeable on very dark hair. Blue Black No. 2 is the more appropriate choice for darker lashes when you want a blue-black effect.

What’s the difference between Deep Blue and Blue Black?
Deep Blue is a true cool-blue shade intended to show blue colour on lighter hair. Blue Black is primarily black with a soft blue shimmer, creating a much darker result.

Is Deep Blue good for blue eyes?
RefectoCil specifically positions Deep Blue as a shade that complements blue eyes and blue/violet eye-makeup looks.

Can I mix RefectoCil Deep Blue with Red?
Yes. RefectoCil recommends mixing Deep Blue and Red to create purple/violet colour effects.

How long does RefectoCil Deep Blue last?
Results can last up to 6 weeks, although longevity varies by individual.

Does Deep Blue require developer?
Yes. Deep Blue needs to be mixed with compatible RefectoCil Oxidant before application.