Demi Dye Arias Deep
DEMI Assalt Arias Deep Natural is the gray-coverage sub-line within DEMI's professional Assalt Arias tube color system. All 10+ shades in this collection share a single goal: natural-looking, accurate tone rendering on gray and white hair. The depth range runs from D-4 (deep brown-black) to D-9 (medium warm brown), and each depth comes in warm beige (WB), cool beige (CB), and blue-black (BB) base options - giving you enough tonal control to match virtually any natural brown or black base.
By Skinsli editorial Updated
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Buying guide
DEMI Assalt Arias Deep Natural: Complete Shade and Application Guide
The Assalt Arias Deep Natural line is DEMI's most focused gray-coverage range - a tightly edited set of depths and bases designed to land on the right side of natural every time. This guide explains how the shade matrix works, how to choose between WB, CB, and BB bases, and how to get consistent results session after session.
The Shade Matrix: Depth Meets Base
The Deep Natural range uses a two-variable system: depth (D-4 through D-9) and base tone (WB, CB, BB). D-4 is the darkest available and produces a near-black result. D-5 and D-7 cover dark and medium brown ranges. D-8 and D-9 deliver medium-light warm brown tones. Cross this depth against your chosen base and you have the complete shade.
Warm Beige (WB): For Golden and Olive Undertones
WB shades add a warm golden character to the color result. On dark bases (D-4, D-5), WB produces a warm dark brown with subtle amber undertone. On lighter depths (D-8, D-9), WB yields a noticeably golden warm brown. This base suits people with warm or olive skin undertones who find cool or ash results look harsh next to their complexion.
Cool Beige (CB): The Neutral, Versatile Base
CB shades are tonally neutral - they do not pull warm or cool, making them the most universally flattering base for a wide range of skin tones. CB is also the most reliable choice when you are uncertain about your undertone, or when the hair will be seen in mixed lighting where warm or cool tones can look unexpected. D-7/CB and D-8/CB are particularly popular for natural-looking medium brown results.
Blue-Black (BB): The Gray-Neutralizing Base
The BB base contains blue pigment that counteracts the yellow cast that appears when oxidative dye processes on white or coarse gray hair. On gray hair, standard WB or CB shades can oxidize with a slight brass or gold tint - BB eliminates this by introducing a complementary cool tone. D-7/BB and D-8/BB are the most requested shades in this sub-line for exactly this reason.
How to Choose Your Depth Number
Match D-number to your natural base depth as a starting point. For gray blending rather than full coverage, go one step lighter than your natural base - this makes the new color fade more gently as it grows out. For full coverage, match your natural level exactly. Going darker than your natural base is possible but slows future lightening significantly if you ever want to change direction.
Processing Time and Developer
Mix at 1:1 by weight with a 6% (20 vol) developer for full gray coverage on virgin hair. Process for 30 minutes at room temperature with a plastic cap to retain heat. On previously colored hair, reduce to 3% developer and 20 minutes. DEMI's own developers are calibrated to this system; third-party developers with similar volumes are generally compatible but may affect timing slightly.
Dealing with Resistant Gray Strands
Coarse, resistant grays - common at the temples and along the part - can partially resist standard oxidative dye. For these areas, apply BB base shades first, leave for the full 30 minutes, and use a warm cap or mild indirect heat. Pre-softening the gray hair with a diluted alkaline pre-treatment can also improve penetration, though DEMI's cream formula is dense enough that pre-softening is rarely necessary unless grays are very resistant.
Root Touchup Timing and Tube Storage
New root growth becomes visible at 3-5 weeks depending on hair growth rate. The Assalt Arias tube format stores cleanly between sessions - roll from the bottom, cap tightly, and keep away from heat and light. One tube typically yields 2-3 root touchups for short to medium hair, making it more economical per session than single-use sachets for frequent users.
FAQ
Frequently asked questions
FAQ
Frequently asked questions
What is the DEMI Assalt Arias Deep Natural line?
It is the gray-coverage sub-line within DEMI's Assalt Arias professional tube hair color system. The 10+ shades cover depths D-4 through D-9 in three base tones (WB, CB, BB), providing precise tonal control for natural-looking coverage of gray or white hair.
What is the color result difference between D-4 and D-9 in Deep Natural?
D-4 is the darkest shade, producing a near-black brown result. D-9 is the lightest in this sub-line, delivering a medium warm brown. D-5 covers dark brown, D-7 medium brown, and D-8 medium-light brown. The number corresponds to the hair lightness level on a 1-12 international depth scale.
Which base - WB, CB, or BB - is best for covering gray hair?
BB (blue-black) base is the most reliable for gray coverage because the blue pigment neutralizes the yellow oxidation cast that appears on white strands. D-7/BB and D-8/BB are the most requested for this purpose. CB is the neutral fallback when you want natural tone without the deepening effect of BB.
How many Deep Natural shades does skinsli carry?
The collection currently includes 10+ SKUs spanning D-4 through D-9 in WB, CB, and BB base variants.
What developer should I use with DEMI Assalt Arias Deep Natural?
For full gray coverage on virgin hair, use 6% (20 vol) developer at a 1:1 mix ratio. For refreshing previously colored hair, 3% (10 vol) is sufficient. Higher-volume developers are not needed and increase scalp irritation risk without improving coverage.
How long do I process DEMI Deep Natural Assalt Arias?
30 minutes is standard for gray coverage on virgin hair. Use a plastic cap to retain body heat during processing. For previously colored hair, 20 minutes is typically enough. Do not exceed 40 minutes.
Is a patch test required before using DEMI Assalt Arias Deep Natural?
Yes. The formula contains PPD (paraphenylenediamine) and related oxidative dye compounds which are common sensitizers. Mix a small amount of the combined color and developer and apply to the inner elbow 48 hours before full application. If you experience any redness, itching, or swelling, do not proceed.
Can I save an opened DEMI Assalt Arias tube between touchups?
Yes. Roll the tube from the bottom, cap tightly, and store in a cool, dry location. Opened but unmixed color cream remains stable for 6-12 months. Never store pre-mixed color - once developer is added, oxidation begins immediately and the mixture cannot be saved.
Is WB base the right choice if my skin has warm or olive undertones?
WB (warm beige) generally suits warm and olive skin tones because the golden character of the color result harmonizes with the skin rather than contrasting with it. Ash or cool-toned color at warm complexions can look harsh or gray, which is why WB is a natural fit. If you prefer a more neutral look, CB is a safe middle ground.
What helps with coarse, resistant gray hair that doesn't take color evenly?
Apply BB-base shades to resistant areas (especially temples and the part) first, leaving maximum processing time. A plastic cap with mild indirect warmth (from a hairdryer set to low, 15 cm away) improves penetration. The cream formula in Assalt Arias tubes is dense, which aids contact time compared to liquid formulas - make sure sections are thin enough for thorough saturation.
How often do I need to retouch roots with DEMI Deep Natural Assalt Arias?
New root growth becomes visible at 3-5 weeks. Most users schedule touchups every 4-6 weeks. The tube format is practical for frequent touchups since unused product stores between sessions - one tube typically covers 2-3 root applications for short or medium-length hair.
What does DEMI's Japanese formulation approach mean for Deep Natural results?
Japanese oxidative hair color systems are known for precise shade calibration, emphasis on natural-looking tonal results, and lower ammonia concentrations than some Western formulas. DEMI's Deep Natural line reflects this: the emphasis is on results that read as real hair color, not as obviously colored hair, and the base tone range (WB/CB/BB) gives enough resolution to distinguish between undertone outcomes that many Western formulas would combine into a single shade.