Demi Aria Dye
<p>This collection pulls together DEMI's <strong>Assalt Aria</strong> permanent hair dye family, the brand's main professional colour system. It spans several sub-lines: <strong>Aria C</strong> and <strong>Aria S</strong> shades, the fashion-leaning Victoria Maple and Camelbage tones, and the deeper <strong>Deep Natural Line</strong> running D-4 through D-9. Some listings come paired with an oxidiser, others as the tube alone.</p><p>The shade codes follow a level-plus-tone pattern: a number for depth, then letters such as WB (warm brown), CB (cool brown) or BB (beige brown) for undertone. DEMI is a Japanese salon brand, so these are oxidative colours built for grey coverage and full salon control rather than at-home guesswork.</p>
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Buying guide
DEMI Assalt Aria hair dye: the full colour family
Assalt Aria is DEMI's permanent colour line, and it branches into several sub-ranges that each do something a little different. This guide explains how the C, S and Deep Natural lines relate, how to read the shade codes, and what the oxidiser pairings mean so you can choose the right tube for the job.
What Assalt Aria is
Assalt Aria is the umbrella name for DEMI's professional permanent hair colour. These are oxidative dyes, which means they develop with a peroxide-based oxidiser to fix pigment inside the hair shaft for lasting results. Because they are built for salon use, the formulas assume the user knows how to mix, time and apply colour.
This page gathers the in-stock Aria tubes across the range, so you can compare sub-lines side by side instead of hunting them down one at a time.
Aria C and Aria S sub-lines
The letter after Aria marks the sub-line. Aria C and Aria S cover the core natural and fashion shade families, and you will see names like Camelbage and Victoria Maple attached to specific tones. These are the shades to reach for when you want a defined cast such as a maple warmth or a soft camel beige rather than a plain brown.
Both sub-lines work on the same oxidative principle, so the choice between them is about the shade result you want, not a different chemistry.
The Deep Natural Line
The Deep Natural Line is the darker, deposit-heavy part of the Aria family, running from D-9 at the lightest to D-4 at the darkest. It is the go-to for rich brown bases and strong grey coverage. If you need a deep, natural-looking result, this is the sub-line to start from.
Lighter or more fashion-forward results usually come from the C and S shades instead, so think of Deep Natural as the foundation and the others as the colour story on top.
Reading the shade codes
Most codes combine a depth number with a tone letter set. The number sets the level, where lower is darker. The letters describe undertone: WB is a warm brown, CB is a cool ashy brown, and BB is a beige brown that softens warmth without going fully cool. Fashion shades may carry their own names like 12/11CaB or 9VM that bundle level and tone into one label.
Two tubes can share a number yet finish differently because of these tone letters, so read the whole code before mixing.
Tubes with and without oxidiser
Some listings in this collection include an oxidiser in the pack, such as the dye plus 100ml oxidiser sets, while others are the colour tube on its own. The oxidiser is what activates the dye, so a standalone tube needs you to supply a developer separately. The volume of that developer changes how much the colour lifts versus simply deposits.
Check the listing before you buy so you know whether you need to add a developer or whether one is already in the box.
Choosing a shade for grey coverage
Grey hair takes pigment more slowly than coloured hair, so deeper levels and a full processing time help it hold. The Deep Natural Line is the strongest choice here because its richer bases deposit more visible colour. Warm and beige tones tend to read more lifelike on grey than strongly cool ones, which can look slightly metallic on fresh growth.
Apply to the most resistant areas first, usually the hairline and temples, and let those sections process for the full window.
Salon use and safety
Every product here is a professional oxidative dye, so a patch test before any full application is essential and the manufacturer's mixing ratio should be your baseline. Wear gloves, protect the skin around the hairline, and follow the timing your developer pairing calls for.
Because results depend on the starting hair and the developer used, treat the shade chart as a guide and confirm with a strand test when you are unsure.
FAQ
Frequently asked questions
FAQ
Frequently asked questions
What is DEMI Assalt Aria?
Assalt Aria is DEMI's professional permanent hair colour line. It is an oxidative dye system that develops with a peroxide oxidiser to fix pigment in the hair for lasting results, and it branches into sub-lines including Aria C, Aria S and the Deep Natural Line.
How do the C, S and Deep Natural sub-lines differ?
Aria C and Aria S cover the core natural and fashion shades, including named tones like Camelbage and Victoria Maple. The Deep Natural Line, marked D-4 to D-9, is the darker deposit-heavy range used for rich brown bases and grey coverage.
How do I read the shade codes?
The number sets depth, with lower numbers being darker. The tone letters describe undertone: WB is warm brown, CB is cool ashy brown, and BB is beige brown. Fashion shades may use combined names such as 9VM or 12/11CaB.
Does the dye come with an oxidiser?
It depends on the listing. Some packs include an oxidiser, such as the dye plus 100ml oxidiser sets, while others are the colour tube alone. A standalone tube needs you to add a developer separately, since the oxidiser is what activates the colour.
Which Aria shade is best for covering grey?
The Deep Natural Line is the strongest choice for grey because its richer bases deposit more visible pigment. Apply to resistant areas like the temples and hairline first and allow the full processing time. Warm or beige tones usually look more natural on grey than strongly cool ones.