Oya is a complete professional colour system: permanent and demi-permanent creams that share one shade chart, concentrates to fine-tune any formula, fast liquid toners, no-developer fashion shades, a matched developer line and three powder lighteners. This guide shows how the pieces fit.
Permanent colour
Oya Permanent Hair Color is an ammonia colour cream in 91 ml tubes with 100% grey coverage. Mix 1:1 with Oya Developer Lotion — 10 volume for deposit, 20 volume for grey coverage and one level of lift, 30 or 40 volume for more lift.
Demi-permanent colour
Oya Demi-Permanent Hair Color Cream matches the permanent palette in deposit-only harmony shades. Mix 1:1 with 5 volume lotion for toning, refreshing ends, glossing and colour correction. The Clear shade adds shine on its own.
Concentrates
Oya Hybrid Concentrates work in both permanent and demi formulas: Violet, Double Violet, Red, Blue, Orange, Yellow, Green and Clear boost a reflect, neutralize an unwanted tone or dilute a formula.
Liquid Rapid Toners
Oya Liquid Rapid Toners are ammonia-free, no-lift toners that work in as little as 5 minutes. They mix with Oya Liquid Activator, not the cream developer.
Lighteners
Choose Oya Lift for up to 7 levels, the 9 Level powder for high lift, or the Ammonia-Free Lightening Powder for a gentler lift. Add Oya Elixir Connection to protect the hair's structure during chemical services.
Vibrant fashion shades
Oya Vibrant direct colours need no developer: apply to pre-lightened hair and mix with Clear to create pastels.
Tools
Keep formulas precise with the digital colour scale, bowl, whisk, application brushes, applicator bottle and pop-up foils.
Safety
All Oya colour-room products are for professional use. Perform an allergy alert test 48 hours before every colour service and wear gloves.
FAQ
Can I mix permanent and demi shades?
Follow the Oya chart; both ranges share one shade numbering so formulas translate easily.
Which developer for toners?
Liquid Rapid Toners use Oya Liquid Activator.