Wella Koleston Perfect 0/66 Intense Violet is a professional “Special Mix” shade—meaning it’s designed to boost, intensify, or customize other hair colors rather than be used alone in most cases.

What it is

• Shade: 0/66 (Intense Violet)
• Type: Permanent creme hair color (2 oz tube)
• Category: Special Mix / intensifier
• Use: Enhancing violet tones, neutralizing unwanted warmth, or creating bold fashion results

Key features

• ME+ dye technology → helps reduce risk of developing new dye allergies while maintaining performance
• Metal Purifier technology → helps prevent damage from metal buildup in hair
• Up to 100% gray coverage when used in full formulations
• True-to-tone, vibrant color with balanced shine and depth
• 1:1 mixing ratio with developer (typically Welloxon)

How pros typically use 0/66

• Add a small amount to formulas to intensify violet tones
• Use to counteract yellow/orange brassiness
• Blend into fashion colors for custom purple or cool-toned results
• Not usually applied alone unless aiming for a very bold violet effect on pre-lightened hair

Quick pro tip

If you’re formulating:

• Start with ¼ to ½ inch of 0/66 per 30g color for subtle violet boost
• Increase gradually—this shade is very concentrated