To fully understand hair colouring, the first step is to understand the basic laws of colour. Colour is a refection of light. You can see when shining a bright light though a prism, the light beam will separate into the six colours that can be seen by the naked eye
These colours can be further split into two groups
These are made by inter mixing the primary colours.
WE can further split these colours into tertiary colours which are made by mixing primary colours with their neighboring secondary colours.
* all hair colour are made up from combinations of these colours but in different amounts. Once we understand the principles of colour we can the transfer it to hair colour.